aqwsed-Those who, through no fault of their own, do not know this, are not thereby condemned; but those who receive the revelation are called to accept it in faith, not because it can be exhaustively explained, but because it is the self-gift of God Himself.
I agree with this wholeheartedly. However, simply knowing that there is a doctrine called the Trinity is itself not a revelation.
One can accept the resurrection of Christ thru faith despite not actually being one of the disciples back then because of the generally understood concepts of 'alive vs dead', for example. The concept of the essence of God is a whole different matter.
We acknowledge different levels of human understanding, how much more so does God. If God has not truly revealed this mystery to a sincere soul, he wouldn't condemn such soul for it either.