Without man and his potential for moral progress, the whole of reality would be a mere wilderness, a thing in vain, and have no final purpose.

Every human being should always be treated as an end and never as a mere instrument.

All the interests of my reason, speculative as well as practical, combine in the three following questions: 1. What can I know? 2. What ought I to do? 3. What may I hope?

A categorical imperative would be one which represented an action as objectively necessary in itself, without reference to any other purpose.

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

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

The greatest problem for the human species, the solution of which nature compels him to seek, is that of attaining a civil society which can administer justice universally.