Every man is to be respected as an absolute end in himself; and it is a crime against the dignity that belongs to him as a human being, to use him as a mere means for some external purpose.

So act that anything you do may become universal law.

Things which we see are not by themselves what we see ... It remains completely unknown to us what the objects may be by themselves and apart from the receptivity of our senses. We know nothing but our manner of perceiving them.

What are the aims which are at the same time duties? They are perfecting of ourselves, the happiness of others.

Prudence reproaches; conscience accuses.

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.

Laws always lose in energy what the government gains in extent.