The feeling of health can only be gained by sickness.

Do we write books so that they shall merely be read? Don't we also write them for employment in the household? For one that is read from start to finish, thousands are leafed through, other thousands lie motionless, others are jammed against mouseholes, thrown at rats, others are stood on, sat on, drummed on, have gingerbread baked on them or are used to light pipes.

Man is a masterpiece of creation if for no other reason than that, all the weight of evidence for determinism notwithstanding, he believes he has free will.

He marvelled at the fact that the cats had two holes cut in their fur at precisely the spot where their eyes were.

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

The fly that doesn't want to be swatted is most secure when it lights on the fly-swatter.

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