The mind is made up by what it feeds upon.

The greatest discovery of the 20th Century is that our attitude of mind determines our quality of life, not circumstances.

Pretend what we may, the whole man within us is at work when we form our philosophical opinions.

It is as if there were in the human consciousness a sense of reality, a feeling of objective presence, a perception of what we may call something there, more deep and more general than any of the special and particular senses by which the current psychology supposes existent realities to be originally revealed.

Compared with what we ought to be, we are only half awake. Our fires are damped, our drafts are checked. We are making use of only a small part of our possible mental and physical resources.

The community stagnates without the impulse of the individual. The impulse dies away without the sympathy of the community.

Language is the most imperfect and expensive means yet discovered for communicating thought.