Nothing so conclusively proves a man's ability to lead others as what he does from day to day to lead himself.  

I reject any religious doctrine that does not appeal to reason and is in conflict with morality.

Some animals are cunning and evil-disposed, as the fox; others, as the dog, are fierce, friendly, and fawning. Some are gentle and easily tamed, as the elephant; some are susceptible of shame, and watchful, as the goose. Some are jealous and fond of ornament, as the peacock.

A woman of the world is anxious to exhibit her form and shape, whether walking, standing, sitting, or sleeping. Even when represented as a picture, she desires to captivate with the charms of her beauty and, thus, to rob men of their steadfast heart.

Gray hairs are signs of wisdom if you hold your tongue, speak and they are but hairs, as in the young.

Everything should be made as simple as possible, but not simpler.

An idea, like a ghost, must be spoken to a little before it will explain itself.

Culture of the mind must be subservient to the heart.

It's not that I'm so smart, it's just that I stay with problems longer.

We shall require a substantially new manner of thinking if mankind is to survive. 

Molality which depends upon the helplessness of a man or woman has not much to recommend it. Morality is rooted in the purity of our hearts.

No religion has mandated killing others as a requirement for its sustenance or promotion.