The terrible events of life are great eye-openers. They force us to learn that which it is wholesome for us to know, but which habitually we try to ignore — namely, that really we have no claim on a long life; that we are each of us liable to be called off at any moment, and that the main point is not how long we live, but with what meaning we fill the short allotted span — for short it is at best.

Felix Adler (1851-1933) German-American educator

Life and Destiny, Lecture 8 “Suffering and Consolation” (1903)
    (Source)