Music is the brandy of the damned.

[Chess] is a foolish expedient for making idle people believe they are doing something very clever, when they are only wasting their time.

Every child has a right to its own bent. . . . It has a right to find its own way and go its own way, whether that way seems wise or foolish to others, exactly as an adult has. It has a right to privacy as to its own doings and its own affairs as much as if it were its own father.

A learned man is an idler who kills time by study.

Crime is only the retail department of what, in wholesale, we call penal law.

The sound body is the product of the sound mind.

Science becomes dangerous only when it imagines that it has reached its goal.