Neither one should hesitate about dedicating oneself to philosophy when young, nor should get tired of doing it when one's old, because no one is ever too young or too old to reach one's soul's healthy.

Those who tell the young man to live well and the old man to die well is nothing but a fool, not only for what life has in happiness to both young and old, but also for one must be careful in live honestly as well as die honestly."

Let no one delay the study of philosophy while young nor weary of it when old

Never say that I have taken it, only that I have given it back.

He who is not satisfied with a little, is satisfied with nothing .

The impassive soul disturbs neither itself nor others.