Most of the evils of life arise from man's being unable to sit still in a room.

Let man then contemplate the whole of nature in her full and grand majesty... No idea approaches it. We may enlarge our conceptions beyond all imaginable space; we only produce atoms in comparison with the reality of things. It is an infinite sphere, the center of which is everywhere, the circumference nowhere.

If you want others to have a good opinion of you, say nothing.

All that tends not to charity is figurative. The sole aim of the Scripture is charity.

I maintain that, if everyone knew what others said about him, there would not be four friends in the world.

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.

What matters it that man should have a little more knowledge of the universe? If he has it, he gets little higher. Is he not always infinitely removed from the end, and is not the duration of our life equally removed from eternity, even if it lasts ten years longer?