Drunkenness is temporary suicide.

If all our happiness is bound up entirely in our personal circumstances it is difficult not to demand of life more than it has to give.

A world full of happiness is not beyond human power to create; the obstacles imposed by inanimate nature are not insuperable. The real obstacles lie in the heart of man, and the cure for these is a firm hope, informed and fortified by thought.

Never let yourself be diverted, either by what you wish to believe, or what you think could have beneficent social effects if it were believed; but look only and solely at what are the facts.

Science, by itself cannot, supply us with an ethic.

The only thing that will redeem mankind is cooperation.

Man needs, for his happiness, not only the enjoyment of this or that, but hope and enterprise and change.