The American who first discovered Columbus made a bad discovery.

If you are going to build something in the air it is always better to build castles than houses of cards.

Perhaps in time the so-called Dark Ages will be thought of as including our own.

Never undertake anything for which you wouldn't have the courage to ask the blessings of heaven.

It is a sure evidence of a good book if it pleases us more and more as we grow older.

We are obliged to regard many of our original minds as crazy at least until we have become as clever as they are.

I made the journey to knowledge like dogs who go for walks with their masters, a hundred times forward and backward over the same territory; and when I arrived I was tired.