To-day man is, and to-morrow he will be seen no more. And being removed out of sight, quickly also he is out of mind. O the dulness and hardness of man's heart, which thinketh only of the present, and looketh not forward to the future. Thou oughtest in every deed and thought so to order thyself, as if thou wert to die this day.

Autor: Thomas à Kempis