The ultimate good desired is better reached by free trade in ideas [and] the best test of truth is the power of the thought to get itself accepted in the competition of the market.

It's a good thing to be rich and a good thing to be strong, but it is a better thing to be beloved of many friends.

Every real thought on every real subject knocks the wind out of somebody or other.

While we've youth in our hearts, we can never grow old.

Success. Is not the position where you are standing, but which direction you are going.

The worst of a modern stylish mansion is that it has no place for ghosts.

It is better for all the world, if instead of waiting to execute degenerate offspring for crime or to let them starve for their imbecility, society can prevent those who are manifestly unfit from continuing their kind. The principle that sustains compulsory vaccination is broad enough to cover cutting the fallopian tubes. Three generations of imbeciles are enough.