The person in peak-experiences feels himself, more than other times, to be the responsible, active, creating center of his activities and of his perceptions. He feels more like a prime-mover, more self-determined (rather than caused, determined, helpless, dependent, passive, weak, bossed). He feels himself to be his own boss, fully responsible, fully volitional, with more "free-will" than at other times, master of his fate, an agent.
Abraham MaslowPeople with intelligence must use their intelligence, people with eyes must use their eyes, people with the capacity to love have the impulse to love and the need to love in order to feel healthy. Capacities clamor to be used, and cease their clamor only when they are used sufficiently. That is to say, capacities are needs, and therefore are intrinsic values as well.
Abraham Maslow