The construction of the universe is certainly very much easier to explain than is that of the plant.

Even truth needs to be clad in new garments if it is to appeal to a new age.

Everyone is perfectly willing to learn from unpleasant experience - if only the damage of the first lesson could be repaired.

One is rarely an impulsive innovator after the age of sixty, but one can still be a very fine orderly and inventive thinker. One rarely procreates children at that age, but one is all the more skilled at educating those who have already been procreated, and education is procreation of another kind.

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

Why does a suppurating lung give so little warning and a sore on the finger so much?

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