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

Travelling is almost like talking with those of other centuries.

Each problem that I solved became a rule, which served afterwards to solve other problems.

The two operations of our understanding, intuition and deduction, on which alone we have said we must rely in the acquisition of knowledge.

The senses deceive from time to time, and it is prudent never to trust wholly those who have deceived us even once.

Common sense is the most fairly distributed thing in the world, for each one thinks he is so well-endowed with it that even those who are hardest to satisfy in all other matters are not in the habit of desiring more of it than they already have.