I suspect that most of the individuals who have religious faith are content with blind faith

We acknowledge but one motive - to follow the truth as we know it, whithersoever it may lead us; but in our heart of hearts we are well assured that the truth which has made us free, will in the end make us glad also.

True freedom is impossible without a mind made free by discipline.

All genuine learning is active, not passive.

The tragedy of being both rational and animal seems to consist in having to choose between duty and desire rather than in making any particular choice

The best protection against propaganda of any sort is the recognition of it for what it is. Only hidden and undetected oratory is really insidious. What reaches the heart without going through the mind is likely to bounce back and put the mind out of business. Propaganda taken in that way is like a drug you do not know you are swallowing. The effect is mysterious; you do not know afterwards why you feel or think the way you do.

Theories of love are found in the works of scientists, philosophers, and theologians.