Epicurus

The cheerful man is also the wise man.

When we are young, we should not hesitate to philosophize, and when we are old, we should not grow tired of philosophizing. For no one is too young or too old to attain health of the soul.

The greatest good is to be free from pain and mental disturbance.

We must exercise ourselves in the things which bring happiness, since, if that be present, we have everything, and if that be absent, all our actions are directed to attaining it.

It is better to be a victim of injustice than to be the perpetrator.

The greatest security of all is to be found in a quiet life withdrawn from the multitude.

The wise man is a happy man, even in the midst of torture.

Justice is a contract of utility entered into to prevent men from harming or being harmed by one another.

The prudent man seeks not pleasure, but freedom from pain.

It is better to endure a necessary pain than to suffer a constant anxiety.

The wise man is happy even when he is being tortured.

The study of nature creates men who are not only free from fear, but also from vanity.

He who has peace of mind has no need of wealth.

The truly wise man is he who does not grieve for what he has not, but rejoices in what he has.

It is not possible to dispel the fear of the most important things unless one understands the whole nature of the universe.

The limit of a pleasant life is not exceeded by him who has put an end to the pain of want and has arranged his life to be safe from all disturbance.

We should envy no one, for good men do not deserve envy, and as for the bad, the more they prosper, the more they harm themselves.

A calm mind is the greatest pleasure.