Aesop's Fables
#37 The Blind Man and the Whelp
A Blind Man was accustomed to distinguishing different animals by touching them with his hands. The whelp of a Wolf was brought to him, with a request that he would feel it, and say what it was. He felt it, and being in doubt, said: "I do not quite know whether it is the cub of a Fox, or the whelp of a Wolf, but this I know full well. It would not be safe to admit him to the sheepfold."
MORAL: Evil tendencies are shown early in life.