When God forgives He forgives unconditionally and without leaving guilt behind.
I said that God takes away all guilt of sin - no guilt is left behind.
No holes, at least not for us.
So after going to Confession, you are a perfect Saint? You have all the virtues there are and there is no vice left in you? There no more inclinations to sin and you have no more desire to sin?
Yes, we cannot know all our sins even if we make a life confession. There are always the chance that we have forgotten sins and sins that we commit unknowingly and when we die we die with some of these sins on our soul.
If one honestly forgets a sin (e.g., they don't intentionally not mention for whatever reason - like its too embarrassing) then when the Priests confers absolution, all of your sins are forgiven - each and every one.
We rely on God's mercy to forgive us in the state between our earthly life and our final reward. There is no burning away of "temperal punishment" or "venial sins" at least not in the Context of Roman Catholicism.
Then what do you make of Scripture such as:
Matthew 5:25-26 - Settle with your opponent quickly while on the way to court with him. Otherwise your opponent will hand you over to the judge, and the judge will hand you over to the guard, and you will be thrown into prison. Amen, I say to you, you will not be released until you have paid the last penny.
Matthew 5:48 - So be perfect, just as your heavenly Father is perfect.
Luke 12:47-48 - That servant who knew his master's will but did not make preparations nor act in accord with his will shall be beaten severely; and the servant who was ignorant of his master's will but acted in a way deserving of a severe beating shall be beaten only lightly. Much will be required of the person entrusted with much, and still more will be demanded of the person entrusted with more.
1 Corinthians 3:10-17 - According to the grace of God given to me, like a wise master builder I laid a foundation, and another is building upon it. But each one must be careful how he builds upon it, for no one can lay a foundation other than the one that is there, namely, Jesus Christ. If anyone builds on this foundation with gold, silver, precious stones, wood, hay, or straw, the work of each will come to light, for the Day will disclose it. It will be revealed with fire, and the fire (itself) will test the quality of each one's work. If the work stands that someone built upon the foundation, that person will receive a wage. But if someone's work is burned up, that one will suffer loss; the person will be saved, but only as through fire. Do you not know that you are the temple of God, and that the Spirit of God dwells in you? If anyone destroys God's temple, God will destroy that person; for the temple of God, which you are, is holy.
Hebrews 12:14 - Strive for peace with everyone, and for that holiness without which no one will see the Lord.
Hebrews 12:23 - and the assembly of the firstborn enrolled in heaven, and God the judge of all, and the spirits of the just made perfect,
1 Peter 1:6-7 -In this you rejoice, although now for a little while you may have to suffer through various trials, so that the genuineness of your faith, more precious than gold that is perishable even though tested by fire, may prove to be for praise, glory, and honor at the revelation of Jesus Christ.
Revelations 3:18-19 - I advise you to buy from me gold refined by fire 14 so that you may be rich, and white garments to put on so that your shameful nakedness may not be exposed, and buy ointment to smear on your eyes so that you may see. Those whom I love, I reprove and chastise. Be earnest, therefore, and repent.
Revelations 21:27 - but nothing unclean will enter it, nor any (one) who does abominable things or tells lies. Only those will enter whose names are written in the Lamb's book of life.
And from the Early Church Fathers:
The same divine fire, therefore, with one and the same force and power, will both burn the wicked and will form them again, and will replace as much as it shall consume of their bodies, and will supply itself with eternal nourishment: which the poets transferred to the vulture of Tityus. Thus, without any wasting of bodies, which regain their substance, it will only burn and affect them with a sense of pain. But when He shall have judged the righteous, He will also try them with fire. Then they whose sins shall exceed either in weight or in number, shall be scorched by the fire and burnt: but they whom full justice and maturity of virtue has imbued will not perceive that fire; for they have something of God in themselves which repels and rejects the violence of the flame. So great is the force of innocence, that the flame shrinks from it without doing harm; which has received from God this power, that it burns the wicked, and is under the command of the righteous. Nor, however, let any one imagine that souls are immediately judged after death. For all are detained in one and a common place of confinement, until the arrival of the time in which the great Judge shall make an investigation of their deserts. Then they whose piety shall have been approved of will receive the reward of immortality; but they whose sins and crimes shall have been brought to light will not rise again, but will be hidden in the same darkness with the wicked, being destined to certain punishment. (Lactantius, The Divine Institutes, 7:21)
I think that the noble athletes of God, who have wrestled all their lives with the invisible enemies, after they have escaped all of their persecutions and have come to the end of life, are examined by the prince of this world; and if they are found to have any wounds from their wrestling, any stains or effects of sin, they are detained. If, however they are found unwounded and without stain, they are, as unconquered, brought by Christ into their rest. (Basil, Homilies on the Psalms, 7:2 - sorry, no online link)
If, then whether by forethought here, or by purgation hereafter, our soul becomes free from any emotional connection with the brute creation, there will be nothing to impede its contemplation of the Beautiful...
...Just as those who refine gold from the dross which it contains not only get this base alloy to melt in the fire, but are obliged to melt the pure gold along with the alloy, and then while this last is being consumed the gold remains, so, while evil is being consumed in the purgatorial fire, the soul that is welded to this evil must inevitably be in the fire too, until the spurious material alloy is consumed and annihilated by this fire...
...When such, then, have been purged from it and utterly removed by the healing processes worked out by the Fire, then every one of the things which make up our conception of the good will come to take their place; incorruption, that is, and life, and honour, and grace, and glory, and everything else that we conjecture is to be seen in God, and in His Image, man as he was made. (Gregory of Nyssa, On the Soul and the Resurrection)
When he has quitted his body and the difference between virtue and vice is known he cannot approach God till the purging fire shall have cleansed the stains with which his soul was infested. That same fire in others will cancel the corruption of matter, and the propensity to evil. (Gregory of Nyssa, Sermon on the Dead - sorry no online link, actually I found one, but it is dead )
And it is not impossible that something of the same kind may take place even after this life. It is a matter that may be inquired into, and either ascertained or left doubtful, whether some believers shall pass through a kind of purgatorial fire, and in proportion as they have loved with more or less devotion the goods that perish, be less or more quickly delivered from it. This cannot, however, be the case of any of those of whom it is said, that they"shall not inherit the kingdom of God," unless after suitable repentance their sins be forgiven them. When I say "suitable," I mean that they are not to be unfruitful in almsgiving; for Holy Scripture lays so much stress on this virtue, that our Lord tells us beforehand, that He will ascribe no merit to those on His right hand but that they abound in it, and no defect to those on His left hand but their want of it, when He shall say to the former,"Come, you blessed of my Father, inherit the kingdom," and to the latter, "Depart from me, you cursed, into everlasting fire." (Augustine, Enchiridion, 69)
For our part, we recognize that even in this life some punishments are purgatorial,—not, indeed, to those whose life is none the better, but rather the worse for them, but to those who are constrained by them to amend their life. All other punishments, whether temporal or eternal, inflicted as they are on every one by divine providence, are sent either on account of past sins, or of sins presently allowed in the life, or to exercise and reveal a man's graces. They may be inflicted by the instrumentality of bad men and angels as well as of the good. For even if any one suffers some hurt through another's wickedness or mistake, the man indeed sins whose ignorance or injustice does the harm; but God, who by His just though hidden judgment permits it to be done, sins not. But temporary punishments are suffered by some in this life only, by others after death, by others both now and then; but all of them before that last and strictest judgment. But of those who suffer temporary punishments after death, all are not doomed to those everlasting pains which are to follow that judgment; for to some, as we have already said, what is not remitted in this world is remitted in the next, that is, they are not punished with the eternal punishment of the world to come. (Augustine, City of God, 21:13)
Our Lord saith in the Gospel: Walk whiles you have the light: and by his Prophet he saith: In time accepted have I heard thee, and in the day of salvation have I holpen thee: which the Apostle St. Paul expounding, saith: Behold, now is the time acceptable; behold, now the day of salvation. Solomon, likewise, saith: Whatsoever thy hand is able to do, work it instantly: for neither work, nor reason, nor knowledge, nor wisdom shall be in hell, whither thou dost hasten. David also saith: Because his mercy is for ever. By which sayings it is plain, that in such state as a man departeth out of this life, in the same he is presented in judgment before God. But yet we must believe that before the day of judgment there is a Purgatory fire for certain small sins: because our Saviour saith, that he which speaketh blasphemy against the holy Ghost, that it shall not be forgiven him, neither in this world, nor in the world to come. Out of which sentence we learn, that some sins are forgiven in this world, and some other may be pardoned in the next: for that which is denied concerning one sin, is consequently understood to be granted touching some other. But yet this, as I said, we have not to believe but only concerning little and very small sins, as, for example, daily idle talk, immoderate laughter, negligence in the care of our family (which kind of offences scarce can they avoid, that know in what sort sin is to be shunned), ignorant errors in matters of no great weight: all which sins be punished after death, if men procured not pardon and remission for them in their lifetime: for when St. Paul saith, that Christ is the foundation: and by and by addeth: And if any man build upon this foundation gold, silver, precious stones, wood, hay, stubble: the work of every one, of what kind it is, the fire shall try. If any man's work abide which he built thereupon, he shall receive reward; if any mans work burn, he shall suffer detriment, but himself shall be saved, yet so as by fire. For although these words may be understood of the fire of tribulation, which men suffer in this world: yet if any will interpret them of the fire of Purgatory, which shall be in the next life: then must he carefully consider, that the Apostle said not that he may be saved by fire, that buildeth upon this foundation iron, brass, or lead, that is, the greater sort of sins, and therefore more hard, and consequently not remissible in that place: but wood, hay, stubble, that is, little and very light sins, which the fire doth easily consume. Yet we have here further to consider, that none can be there purged, no, not for the least sins that be, unless in his lifetime he deserved by virtuous works to find such favour in that place. (Gregory the Great, Dialogues 4:39)