To be proud of virtue, is to poison yourself with the Antidote.

Drive your business. Let not your business drive you.

A man must have a good deal of vanity who believes, and a good deal of boldness who affirms, that all the doctrines he holds are true, and all he rejects are false.

The key that unlocks a door is a key to keep if you want to go through that door again.

Families ought to be noisy.

What science can there be more noble, more excellent, more useful for men, more admirably high and demonstrative, than this of mathematics?

When you are finished changing, you are finished.