It is not that we have a short time to live, but that we waste a lot of it. Life is long enough, and a sufficiently generous amount has been given to us for the highest achievements if it were all well invested.
You have been preoccupied while life hastens on. Meanwhile death will arrive, and you have no choice in making yourself available for that.
You act like mortals in all that you fear, and like immortals in all that you desire.
Seneca (2005-09-06). On the Shortness of Life (Penguin Great Ideas) (p. 5). Penguin Publishing Group. Kindle Edition.