Parents usually educate their children merely in such a manner than however bad the world may be, they may adapt themselves to its present conditions. But they ought to give them an education so much better than this, that a better condition of things may thereby be brought about by the future.

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

The more we come in contact with animals and observe their behaviour, the more we love them, for we see how great is their care of the young.

All our knowledge begins with the senses, proceeds then to the understanding, and ends with reason. There is nothing higher than reason.

Act so that the maxim of your act could be made the principle of a universal law.

It is precisely in knowing its limits that philosophy consists.

If we could see ourselves... as we really are, we should see ourselves in a world of spiritual natures, our community which neither began at birth nor will end with the death of the body.