Plurality which is not reduced to unity is confusion; unity which does not depend on plurality is tyranny.

The pagans do not know God, and love only the earth. The Jews know the true God, and love only the earth. The Christians know the true God, and do not love the earth.

Men seek rest in a struggle against difficulties; and when they have conquered these, rest becomes insufferable.

Those whom we call ancient were really new in all things, and properly constituted the infancy of mankind.

Look somewhere else for someone who can follow you in your researches about numbers. For my part, I confess that they are far beyond me, and I am competent only to admire them.

By a peculiar prerogative, not only each individual is making daily advances in the sciences, and may make advances in morality (which is the science, by way of eminence, of living well and being happy), but all mankind together is making a continual progress in proportion as the universe grows older. So that the whole human race, during the course of so many ages, may be considered as one man who never ceases to live and learn.

Man lives between the infinitely large and the infinitely small.