To perceive the total truth - at least to the greatest extent one can in one's time, in accordance with what one is - is a staggering event in itself; it is the necessary prerequisite for moving with what grace is still possible in this world. One can't surmount or even cope with what one can't see (here we don't speak of physical vision, but general perception).
But once one sees, one can't un-see it. When one sees, one is bestowed with the unenviable but necessary task of coming to terms with that truth and acting in accordance with it. It affixes a constraint on one's actions, while at the same time illuminating a potential path to some sort of actualization if pursued to its logical end.
