The lesson seems almost Zen: you live longer only when you stop trying to live longer.

You can't live forever; you can't live forever.

You should give up.'
'Why?'
'For one thing, you'll live longer.'
'Oh, you don't live longer. It just seems longer.

You're alive only once, as far as we know, and what could be worse than getting to the end of your life and realizing you hadn't lived it?

Though you can live for as much as you like, but your longevity is stupidity if you were leading a worthless life.

It's only when we truly know and understand that we have a limited time on Earth — and that we have no way of knowing when our time is up — that we will begin to live each day to the fullest.

Were you to live three thousand years, or even a countless multiple of that, keep in mind that no one ever loses a life other than the one they are living, and no one ever lives a life other than the one they are losing. The longest and the shortest life, then, amount to the same, for the present moment lasts the same for all and is all anyone possesses. No one can lose either the past or the future, for how can someone be deprived of what’s not theirs?” — MARCUS AURELIUS, MEDITATIONS, 2.14

Life is only precious because it ends, kid.

Enjoy your life as long as you want, but the moment the pain becomes too much, it’s in your hands to stop it.

Your life is over when you stop living it. If you can truly retire you had a job but not an occupation.

Of course, you only live one life, and you make all your mistakes, and learn what not to do, and that's the end of you.

and yet I feel that I cannot go on living forever;

When you can live forever what do you live for?

Your time on this earth is limited, don’t live someone else's life, live by your vision