The impassive soul disturbs neither itself nor others.

The noble man is chiefly concerned with wisdom and friendship; of these, the former is a mortal good, the latter and immortal one.

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 .

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.