No state at war with another state should engage in hostilities of such a kind as to render mutual confidence impossible when peace will have been made.

It is therefore correct to say that the senses do not err — not because they always judge rightly, but because they do not judge at all.

The ideal of the supreme being is nothing but a regulative principle of reason which directs us to look upon all connection in the world as if it originated from an all-sufficient necessary cause.

The yellow Indians do have a meagre talent. The Negroes are far below them, and at the lowest point are a part of the American people.

Whereas the beautiful is limited, the sublime is limitless, so that the mind in the presence of the sublime, attempting to imagine what it cannot, has pain in the failure but pleasure in contemplating the immensity of the attempt

A man who has tasted with profound enjoyment the pleasure of agreeable society will eat with a greater appetite than he who rode horseback for two hours. An amusing lecture is as useful for health as the exercise of the body.

The question is not so much whether there is life on Mars as whether it will continue to be possible to live on Earth