How can you be certain that your whole life is not a dream?

You just keep pushing. You just keep pushing. I made every mistake that could be made. But I just kept pushing.

It is to the body alone that we should attribute everything that can be observed in us to oppose our reason.

Thus each truth discovered was a rule available in the discovery of subsequent ones.

It is contrary to reasoning to say that there is a vacuum or space in which there is absolutely nothing.

If you would be a real seeker after truth, it is necessary that at least once in your life you doubt, as far as possible, all things.

A state is better governed which has few laws, and those laws strictly observed.