The man without a purpose is a man who drifts at the mercy of random feelings or unidentified urges and is capable of any evil, because he is totally out of control of his own life. In order to be in control of your life, you have to have a purpose-a productive purpose.

The Ayn Rand Lexicon: Objectivism from A to Z (ed. Penguin, 1988) - ISBN: 9781101137246