One should never despair too soon.

I am up and about when I am ill, and in the most appalling weather. I am on horseback when other men would be flat out on their beds, complaining. We are made for action, and activity is the sovereign remedy for all physical ills.

You will certainly grant me that neither antiquity nor whatever nation has devised a more repulsive and blasphemous absurdity than that of eating your God. This is the most disgusting dogma of Christian religion, the greatest insult to the Highest Being, the climax of madness and insanity.

The greatest and noblest pleasure which we have in this world is to discover new truths, and the next is to shake off old prejudices.

Be more than you seem to be.

Great things are achieved only when we take great risks.

A man, who can, in cold blood, hunt and torture a poor, innocent animal, cannot feel much compassion for the distress of his own species.