Epicurus (341 BC-270 BC)

Epicurus was an ancient Greek philosopher who founded Epicureanism, a highly influential school of philosophy; it asserted that philosophy's purpose is to attain as well as to help others attain tranquil lives, characterized by freedom from fear and the absence of pain.

Quotes

If the gods listened to the prayers of men, all humankind would quickly perish since they constantly pray for many evils to befall one another.
Do not spoil what you have by desiring what you have not; but remember that what you now have was once among the things you only hoped for.

Hope
The man least dependent upon the morrow goes to meet the morrow most cheerfully.
The greater the difficulty, the more the glory in surmounting it.
The greater the difficulty the more glory in surmounting it. Skillful pilots gain their reputation from storms and tempests.
A strict belief, fate is the worst kind of slavery; on the other hand there is comfort in the thought that God will be moved by our prayers.
He is a wise man who does not grieve for the things which he has not, but rejoices for those which he has.
Death is nothing to us, since when we are, death has not come, and when death has come, we are not.

Death
Pleasure is the beginning and the end of living happily.
It is not so much our friend's help that helps us as the confidence of their help.
Justice is a contract of expediency, entered upon to prevent men harming or being harmed.

Justice
Is God willing to prevent evil, but not able? Then he is not omnipotent. Is he able, but not willing? Then he is malevolent. Is he both able and willing? Then whence cometh evil? Is he neither able nor willing? Then why call him God?.