But is looking for it a waste of time? Experts say Aristotle's advice teaches us that well-being comes not when we look for it but when we live with purpose and meaning.
Foolproof: 2000-year-old recipe for happiness
Recipe for happiness: Many believe Aristotle's ancient wisdom is still relevant today. Glossary
Aristotle - A student of Plato, tutor to Alexander the Great and the father of political philosophy.
Courage - Bravery. Strength in the face of difficult situations.
Purpose - A reason for doing something.