The belief that we some day shall be able to prevent war is to me one with the belief in the possibility of making humanity really human.

The very forces that liberty has set free work against the dangerous consequences of liberty.

Conventionality is the tacit agreement to set appearances before reality, form before content.

Love is moral even without legal marriage, but marriage is immoral without love.

Anyone who would attempt the task of felling a virgin forest with a penknife would probably feel the same paralysis of despair that the reformer feels when confronted with existing school systems.

All philanthropy ... is only a savory fumigation burning at the mouth of a sewer. This incense offering makes the air more endurable to passers-by, but it does not hinder the infection in the sewer from spreading.

Is human love the growth of the human will ?