"Life itself is a school, and Nature always a fresh study"

"Life is life - whether in a cat, or dog or man. There is no difference there between a cat or a man. The idea of difference is a human conception for man's own advantage"

"Plunge boldly into the thick of life, and seize it where you will, it is always interesting"

"The art of medicine consists in amusing the patient while nature cures the disease"

"Cats and monkeys; monkeys and cats; all human life is there"

"Telling a teenager the facts of life is like giving a fish a bath"

"It is a useless life that is not consecrated to a great ideal. It is like a stone wasted on the field without becoming a part of any edifice"

"Business is the salt of life"

"Experience keeps a dear school, but fools will learn in no other"

"Education is a private matter between the person and the world of knowledge and experience, and has little to do with school or college"

"Sex is a part of nature. I go along with nature"