As a man thinketh, so is he, and as a man chooseth, so is he.

Sleep lingers all our lifetime about our eyes, as night hovers all day in the boughs of the fir-tree.

Literature is the effort of man to indemnify himself for the wrongs of his condition.

The purpose of life is not to be happy. It is to be useful, to be honorable, to be compassionate, to have it make some difference that you have lived and lived well.

Tobacco, coffee, alcohol, hashish, prussic acid, strychnine, are weak dilutions; the surest poison is time. This cup which nature puts to our lips, has a wonderful virtue, surpassing that of any other draught. It opens the senses, adds power, fills us with exalted dreams, which we call hope, love, ambition, science; especially it creates a craving for larger draughts of itself.

To map out a course of action and follow it to an end requires some of the same courage that a soldier needs.

Who shall forbid a wise skepticism, seeing that there is no practical question on which anything more than an approximate solution can be had?