"As one studies these preconditions, one becomes saddened by the ease with which human potentiality can be destroyed or repressed, so that a fully-human person can seem like a miracle, so improbable a happening as to be awe-inspiring. And simultaneously one is heartened by the fact that self-actualizing persons do in fact exist, that they are therefore possible, that the gauntlet of dangers can be run, that the finish line can be crossed."