A crab1 said to her son, "Why do you walk so one-sided, my child?it is far more becoming to go straight forward." The young crabreplied: "Quite true, dear mother; and if you will show me thestraight way, I will promise to walk in it." The mother tried invain, and submitted without remonstrance2 to the reproof3 of herchild. 
Example is more powerful than precept4. 