The thing is that you guys all talk about it being "so obvious" that God is real and Orthodoxy is the truth--even though every single religion known to man claims the same thing about their deity and religion, yet, neither of them--Orthodoxy included--can present any good reason to back up their claim and distinguish themselves from the others.
"Obvious" is exactly what we, following scripture, should refuse to say that others will perceive even if we perceive it thus. "If this religion boasted of having a clear vision of God, and of possessing Him plain and unveiled, then to say that nothing we see in the world reveals Him with this degree of clarity would indeed be to attack it. But it says, on the contrary, that man is in darkness and far from God, that He has hidden Himself from man’s knowledge, and that the name He has given Himself in the Scriptures is in fact The Hidden God (Is 45:15). Therefore if it seeks to establish these two facts: that God has in the church erected visible signs by which those who sincerely seek Him may recognize Him, and that he has nevertheless so concealed them that He will only be perceived by those who seek Him with all their hearts, what advantage can the attackers gain when, while admitting that they neglect to seek for the truth, they yet cry that nothing reveals it? For the very darkness in which they lie, and for which they blame the Church, establishes one of her two claims, without invalidating the other, and also, far from destroying her doctrine, confirms it” (Blaise Pascal, Pensees, 335).
“To obtain anything from God, the outward must be joined to the inward; that is to say we must kneel and pray alone, etc. so that proud man, who would not submit to God, may now be subject to the body. To expect any help from this outward act is superstition; a refusal to join it to our inward acts is pride. For we must not misunderstand ourselves; we are as much machines as mind. And hence the means by which a man is persuaded are not demonstration alone. How few things are demonstrated! Proofs convince only the mind. It is habit that produces our strongest and most accepted proofs; it guides the machine, which carries the mind with it unconsciously. Who has proved that there will be a morrow and that we will die?” -Blaise Pascal
Christ understood how the Father might be known -He alone knows the Father and He alone reveals Him. He did not leave us with a syllogism, or a philosophical treatise, but with men who knew Him, a Gospel, and a path. "Walk while you have the light, that darkness may not overtake you; he who walks in the darkness does not know where he goes." -John 12:35 “FIRE: God of Abraham, God of Isaac, God of Jacob, not of philosophers and scholars. God of Jesus Christ… He can only be found by the ways taught in the Gospel… He can only be kept by the ways taught in the Gospel.” -Pascal
John 3:19-21: "And this is the condemnation, that light is come into the world, and men loved darkness rather than light, because their deeds were evil. For every one that doeth evil hateth the light, neither cometh to the light, lest his deeds should be reproved. But he that doeth truth cometh to the light, that his deeds may be made manifest, that they are wrought in God." It is ourselves we must examine wholeheartedly if our perception of God is dimmed. The OT never presents an argument for God's existence. Christ of the Gospels presents no burden of proof, but only a burden of wholehearted seeking, receiving, and giving; in a word it is grace: Kyrie eleison!