Aristotle believed that virtue is a trait of character that helps achieve a good life through reason. Virtues must be united with passions, faculties, and character states. According to Aristotle, everything has a purpose or "telos." The telos of humans is happiness or fulfillment through using their abilities to their fullest potential. Aristotle defined happiness as the meaning and purpose of life achieved through developing good moral character over a lifetime and obtaining all goods like health, wealth, and knowledge.