"Let no one when young delay to study philosophy, nor when old grow weary of studying it. For no one is either too early or too late for the health of the soul."

"We must therefore pursue the things that make for happiness, seeing that when happiness is present, we have everything; but when it is absent, we do everything to possess it."

"Against all things it is possible to provide security, but as against death we all live in an unwalled city."

"The wise man will not be miserable when he is old."

"The wise man avoids pain, but does not seek pleasure."