Aristotle believed that the ultimate goal of human life is eudaimonia, which is often translated as 'happiness' or 'flourishing.'

Plato identified four cardinal virtues: wisdom, courage, justice, and temperance.

Socrates is credited with the famous saying, 'Know thyself.'

Apatheia, in Stoic philosophy, refers to indifference to external events and the ability to maintain inner peace and tranquility regardless of circumstances.

Aristotle believed that virtue is necessary for happiness, but it is not sufficient. External factors, such as good fortune, also play a role in achieving happiness.

Telos, in Aristotle's philosophy, refers to the ultimate purpose or goal of a thing, including human beings.

Marcus Aurelius, the Roman emperor, wrote the influential work 'Meditations,' a collection of personal writings and reflections on Stoic philosophy.

Ataraxia, in Epicurean philosophy, refers to the state of absence of pain and suffering, tranquility of mind, and freedom from fear and anxiety.

Aristotle believed that courage is the mean between cowardice and rashness.

Socrates is credited with the famous saying, 'The unexamined life is not worth living.'

Eudaimonia, in Aristotle's ethical theory, refers to happiness, flourishing, and well-being.

Epictetus, the Greek philosopher, wrote the influential work 'Discourses,' a collection of lectures and discussions on Stoic philosophy.

Aristotle believed that liberality is the mean between stinginess and extravagance.

Prohairesis, in Aristotle's ethical theory, refers to deliberate choice, intention, and purpose.

Seneca, the Roman philosopher, statesman, and playwright, wrote the influential work 'Letters from a Stoic,' a collection of letters addressed to his friend Lucilius.