Some people feel with their heads and think with their hearts.

The most entertaining surface on earth is the human face.

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.

There are people who possess not so much genius as a certain talent for perceiving the desires of the century, or even of the decade, before it has done so itself.

The greater part of human misery is caused by indolence.

If another Messiah was born he could hardly do so much good as the printing-press.

We cannot remember too often that when we observe nature, and especially the ordering of nature, it is always ourselves alone we are observing.