When we lose one we love, our bitterest tears are called forth by the memory of hours when we loved not enough. – Maurice Maeterlinck, Wisdom and Destiny, 1901, translated by Alfred Sutro

Those who make the worst use of their time are the first to complain of its shortness. РJean de La Bruy̬re

There was George, throwing away in hideous sloth the inestimable gift of time; his valuable life, every second of which he would have to account for hereafter, passing away from him, unused…. sprawling there, sunk in soul-clogging oblivion. – Jerome K. Jerome, Three Men in a Boat (To Say Nothing of the Dog), 1889