Happiness is a state of mind or feeling characterized by contentment, satisfaction, pleasure, or joy.[1] A variety of philosophical, religious, psychological and biological approaches have striven to define happiness and identify its sources. Philosophers and religious thinkers often define happiness in terms of living a good life, or flourishing, rather than simply as an emotion. Happiness in this older sense was used to translate the Greek Eudaimonia, and is still used in virtue ethics.