There are different points of view on confession among the Orthodox, AFAIK.
I was at one point struck by a line from the journals of Fr. Alexander Schmemann, former Dean of St. Vladimir Orthodox seminary in Crestwood, N.Y. and one of the most prominent 20th century Orthodox theologians-evangelists. He wrote that if it were up to him, he would simply ABOLISH individual confessions. In his opinion, they are almost always fake, i.e. the penitent is not really a penitent but, rather, a person who fancies the priest as a psychological therapist-comforter, and him/herself as a patient who needs therapy. SO, the sad result is, these "patients" tell their priests long stories where the principal plot is not sin but the so-called "conditions" of their souls: "I am intemperate, angry, lustful, dishonest, injurious to people, lazy, self-indulging, neglectful in prayer," etc. Usually, the priest can do nothing about this, so the whole procedure becomes a total waste of time and the priest might well become distracted from his real duty. Fr. Alexander further writes that one should go to confession ONLY in the case he or she committed A CLEAR, REAL SIN.
Perhaps Heorhij here is really saying.. that we should only confess that which we've actually done? Not just the fact that you have a tendency towards.. a given state of mind (lustful, angry, intemperate, lazy) ...
Granted these are all sins, to be prone towards any one of thse. But those can easily be confessed in our private prayers to God. The priest or spiritual father the way I understand it -- is there to counsel us, when we have a problem. If we are clearly having an issue with a particular sin.. then he can give us advise as to how to overcome it.. or at least stop repeating it as much.