Some Dostoevsky

"See, here you have passed by a small child, passed by in anger, with a foul word, with a wrathful soul; you perhaps did not notice the child, but he saw you, and your unsightly and impious image has remained in his defenseless heart. You did not know it, but you may thereby have planted a bad seed in him, and it may grow, and all because you did not restrain yourself before the child, because you did not nurture in yourself a heedful, active love. Brothers, love is a teacher, but one must know how to acquire it, for it is difficult to acquire, it is dearly bought, by long work over a long time, for one ought to love not for a chance moment but for all time. Anyone, even a wicked man, can love by chance."

(Dostoevsky, Fyodor. The Brothers Karamazov. Trans. Richard Pevear and Larissa Volokhonsky. New York: Farrar, Straus & Giroux, 2002. 319)