The most dangerous untruths are truths slightly distorted.

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

Imagine the world so greatly magnified that particles of light look like twenty-four-pound cannon balls.

I have remarked very clearly that I am often of one opinion when I am lying down and of another when I am standing up.

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

Nothing is more conducive to peace of mind than not having any opinion at all.

The noble simplicity in the works of nature only too often originates in the noble shortsightedness of him who observes it.