Religion is the recognition of all our duties as divine commands.

The history of the human race, viewed as a whole, may be regarded as the realization of a hidden plan of nature to bring about a political constitution, internally, and for this purpose, also externally perfect, as the only state in which all the capacities implanted by her in mankind can be fully developed.

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?

Fallacious and misleading arguments are most easily detected if set out in correct syllogistic form.

Act only according to that maxim whereby you can at the same time will that it should become a universal law.

Art is purposiveness without purpose.

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.