True happiness is to enjoy the present, without anxious dependence upon the future, not to amuse ourselves with either hopes or fears but to rest satisfied with what we have, which is sufficient, for he that is so wants nothing. The greatest blessings of mankind are within us and within our reach. A wise man is content with his lot, whatever it may be, without wishing for what he has not.
Seneca the YoungerMy advice is really this: what we hear the philosophers saying and what we find in their writings should be applied in our pursuit of the happy life. We should hunt out the helpful pieces of teaching and the spirited and noble-minded sayings which are capable of immediate practical application-not far far-fetched or archaic expressions or extravagant metaphors and figures of speech-and learn them so well that words become works.
Seneca the Younger