Seneca

Begin at once to live, and count each separate day as a separate life.

Leisure without books is death.

The part of life we really live is small. For all the rest of existence is not life, but merely time.

Life is long enough, and it has been given in sufficiently generous measure to allow the accomplishment of the very greatest things if the whole of it is well invested.

It is a great evil to be always beginning.

Wherever there is a human being, there is an opportunity for a kindness.

All cruelty springs from weakness.

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.

How many have had their ruin brought about by the possession of an estate, how many by the enjoyment of office! Every evil that can befall a man comes from himself.

The greatest remedy for anger is delay.

To be rich is not to have much, but to desire little.

What is a good man but one who struggles with fortune?

There is no more unfortunate creature under the sun than a man who has everything.

It is a great thing to know how to hold your tongue.

What need is there to weep over parts of life? The whole of it is a cause for tears.

The happy life is to be found in the mind's freedom from disturbance.

If you really want to escape the things that harass you, what you're in need of is not to be in a different place but to be a different person.

There is no easy way from the earth to the stars.

The wish for safety is often a sign of cowardice.

You act like mortals in all that you fear, and like immortals in all that you desire.