When all experts agree, you need to watch out.

Inferences of Science and Common Sense differ from those of deductive logic and mathematics in a very important respect, namely, when the premises are true and the reasoning correct, the conclusion is only probable.

Those who forget good and evil and seek only to know the facts are more likely to achieve good than those who view the world through the distorting medium of their own desires.

He will see himself and life and the world as truly as our human limitations will permit; realizing the brevity and minuteness of human life, he will realize also that in individual minds is concentrated whatever of value the known universe contains.

It is obviously possible that what we call waking life may only be an unusual and persistent nightmare.

Unrestricted nationalism is, in the long run, incompatible with world peace.

War can only be abolished by the establishment of a world government.