It is only in being-towards-death that one can become the person who one truly is, Concealed in the idea of death as the possibility of impossibility.

From “Death and Mortality” in division two in the book Being and time by Martin Heidegger

If our being is finite, then an authentic human life can only be found by confronting finitude and trying to make a meaning out of the fact of our death. Heidegger subscribes to the ancient maxim that “to philosophize is to learn how to die.” Mortality is that in relation to which we shape and fashion our selfhood.

Source : Theguardian