From Ecclesiastes:

7 All streams run to the sea,
but the sea is not full;
to the place where the streams flow,
there they flow again.

. . .

9 What has been is what will be,
and what has been done is what will be done,
and there is nothing new under the sun.

10 Is there a thing of which it is said,
“See, this is new”?
It has been already
in the ages before us.

Assuming time is cyclical, our actions today will be repeated once more and again for all eternity. For the sake of your future self (and now!), live an enjoyable life, for soon you’ll have no choice but to relive it . . . yet, do you even have the choice to better your life now or are you just living the script of countless lifetimes ago? Perhaps this life is the very first in what will be an infinite sequence of lives. If so, I would be so far content to live and relive my life for all eternity, as it stands. Would you?