Paulo Coelho said this quote

“ Still, being fragile creatures, humans always try to hide from themselves the certainty that they will die. They do not see that it is death itself that motivates them to do the best things in their lives. They are afraid to step into the dark, afraid of the unknown, and their only way of conquering that fear is to ignore the fact that their days are numbered. They do not see that with an awareness of death, they would be able to be even more daring, to go much further in their daily conquests, because then they would have nothing to lose- for death itself is inevitable. ”