Mathematics, rightly viewed, possesses not only truth, but supreme beauty-a beauty cold and austere ... yet sublimely pure and capable of stern perfection such as only the greatest art can show.

I feel life is so small unless it has windows into other worlds.

There is no difference between someone who eats too little and sees Heaven and someone who drinks too much and sees snakes.

Boys and girls should be taught respect for each other's liberty... and that jealousy and possessiveness kill love.

What science cannot discover, mankind cannot know.

The sentiments of an adult are compounded of a kernel of instinct surrounded by a vast husk of education.

When anaesthetics were invented they were thought to be wicked as being an attempt to thwart God's will. Insanity was thought to be due to diabolic possession, and it was believed that demons inhabiting a madman could be driven out by inflicting pain upon him, and so making them uncomfortable. In pursuit of this opinion, lunatics were treated for years on end with systematic and conscientious brutality.