We are better able to study our neighbours than ourselves, and their actions than our own.

No one praises happiness as one praises justice, but we call it a 'blessing,' deeming it something higher and more divine than things we praise.

But nature flies from the infinite; for the infinite is imperfect, and nature always seeks an end.

Be a free thinker and don't accept everything you hear as truth. Be critical and evaluate what you believe in.

For what one has to learn to do, we learn by doing.

The senses are gateways to the intelligence. There is nothing in the intelligence which did not first pass through the senses.

The body is at its best between the ages of thirty and thirty-five.