Praise everybody, I say to such: never be squeamish, but speak out your compliment both point-blank in a man's face, and behind his back, when you know there is a reasonable chance of his hearing it again. Never lose a chance of saying a kind word. As Collingwood never saw a vacant place in his estate but he took an acorn out of his pocket and popped it in; so deal with your compliments through life. An acorn costs nothing; but it may sprout into a prodigious bit of timber.
— Vanity Fair
by William Makepeace Thackeray