The Crab and Its Mother

A CRAB said to her son, "Why do you walk so one-sided, my child?
It is far more becoming to go straight forward."  The young Crab
replied:  "Quite true, dear Mother; and if you will show me the
straight way, I will promise to walk in it."  The Mother tried in
vain, and submitted without remonstrance to the reproof of her

Example is more powerful than precept.