Even dogs and horses have their actions modified by association with human beings; they form different habits because human beings are concerned with what they do.

I believe that in this way the teacher always is the prophet of the true God and the usherer in of the true kingdom of God.

There is no god and there is no soul. Hence, there is no need for the props of traditional religion. With dogma and creed excluded, then immutable truth is dead and buried. There is no room for fixed and natural law or permanent moral absolutes.

The words "environment," "medium" denote something more than surroundings which encompass an individual. They denote the specific continuity of the surroundings with his own active tendencies.

Continuity of life means continual readaptation of the environment to the needs of living organisms.

Liberty is not just an idea, an abstract principle. It is power, effective power to do specific things. There is no such thing as liberty in general; liberty, so to speak, at large.

A man can be prevented from breaking into other persons' houses by shutting him up, but shutting him up may not alter his disposition to commit burglary.