Erudition can produce foliage without bearing fruit.

There is no greater impediment to progress in the sciences than the desire to see it take place too quickly.

Some people come by the name of genius in the same way that certain insects come by the name of centipede -- not because they have a hundred feet, but because most people can't count above 14.

Nothing can contribute more to peace of soul than the lack of any opinion whatever.

Nowadays beautiful women are counted among the talents of their husbands.

If an angel were to tell us about his philosophy, I believe many of his statements might well sound like '2 x 2= 13'.

A writer who wishes to be read by posterity must not be averse to putting hints which might give rise to whole books, or ideas for learned discussions, in some corner of a chapter so that one should think he can afford to throw them away by the thousand.