I am assured in as much as I have read the fathers, who have been handed the deposit of Faith. Or if not the Holy Fathers of the Church, then by what criteria would you propose?
OOD, Based on what you have written I would propose more of an apophatic type of criteria, in other words, a criteria that is based on what is not your peculiar and presumptuous take on the writings of the Holy Fathers.
...in as much as I have read the fathers...
My only advice to you (and yes I know that the giving of unsolicited advice is the surest sign of prelest - May God forgive my sinning!) is to read much more of the Fathers and eventually you will come across writings such as these:
Wherefore a man can know nothing about the judgments of God. He alone is the One Who takes account of all and is able to judge the hearts of each one of us, as He alone is our Master. Truly it happens that a man may do a certain thing (which seems to be wrong) out of simplicity, and there may be something about it which makes more amends to God than your whole life; how are you going to sit in judgment and constrict your own soul? And should it happen that he has fallen away, how do you know how much and how well he fought, how much blood he sweated before he did it? Perhaps so little fault can be found in him that God can look on his action as if it were just, for God looks on his labor and all the struggle he had before he did it, and has pity on him. And you know this, and what God has spared him for, are you going to condemn him for, and ruin your own soul? And how do you know what tears he has shed about it before God? You may well know about the sin, but you do not know about the repentance.
Abba Dorotheos of Gaza
'By judging another you condemn yourself' [Rom. 2:1]. But men have given up weeping for their own sins and have taken judgment away from the Son."
St. Maximos the Confessor
I'd imagine that being a moderator of this discussion forum is a hard enough job without taking on the work of the Lord Jesus Christ, the Righteous Judge.