The Viper and The File

It is useless attacking the insensible. A viper (or snake), in vain, attempts to bite a steel file. It is useless attacking the insensible.

A Smith and His Dog

A dog slept while his Master, a Blacksmith, worked. When the Master went to eat the Dog woke for his food. In jest, one day the Master chided the Dog. All creatures naturally look to the business of food and propagation.