Those who are led by their feelings rather than by pure reason are doomed to fall by their own blindness. Also, reason knows no bounds. With it man can learn anything and everything. Objectivism rejects those who claim that we cannot know anything at all for certain. Human Nature Man's other great capacity which is different from reason, but works hand in hand with it, is free will.
Man is a being of volitional consciousness.
He has the capacity to decide things completely of his own will. His decisions are his alone, and therefore he cannot blame his mistakes on anyone or anything else. Man has the ability to fully decide every single thing he does. Because of this, objectivism disagrees with any sort of determinism. Ethics Man is his own goal.