Seneca

Life is divided into three periods, past, present and future. Of these, the present is short, the future is doubtful, the past is certain.

life, if you know how to use it, is long.

People are frugal in guarding their personal property; but as soon as it comes to squandering time they are most wasteful of the one thing in which it is right to be stingy

You are living as if destined to live for ever; your own frailty never occurs to you; you don’t notice how much time has already passed, but squander it as though you had a full and overflowing supply – though all the while that very day which you are devoting to somebody or something may be your last

Aren’t you ashamed to keep for yourself just the remnants of your life, and to devote to wisdom only that time which cannot be spent on any business?

Most human beings, Paulinus,* complain about the meanness of nature, because we are born for a brief span of life, and because this spell of time that has been given to us rushes by so swiftly and rapidly that with very few exceptions life ceases for the rest of us just when we are getting ready for it.

Why do we complain about nature? She has acted kindly: life is long if you know how to use it.

So what is the reason for this? You are living as if destined to live for ever; your own frailty never occurs to you; you don’t notice how much time has already passed, but squander it as though you had a full and overflowing supply – though all the while that very day which you are devoting to somebody or something may be your last. You act like mortals in all that you fear, and like immortals in all that you desire.

But life is very short and anxious for those who forget the past, neglect the present, and fear the future. When they come to the end of it, the poor wretches realize too late that for all this time they have been preoccupied in doing nothing.

I had a try at him a long while ago myself.’ ‘When was this?’ you’ll say.
Before I was born.
Death is just not being.
What that is like I know already.
It will be the same after me as it was before me