Ignorance and superstition ever bear a close and mathematical relation to each other.

Ignorance and superstition ever bear a close and mathematical relation to each other.

The eye sees only what the mind is prepared to comprehend.

The eye sees only what the mind is prepared to comprehend.

To know a person's religion we need not listen to his profession of faith but must find his brand of read more

To know a person's religion we need not listen to his profession of faith but must find his brand of intolerance.

We have no assurance that half-truth will make us free.

We have no assurance that half-truth will make us free.

Reason's biological function is to preserve and promote life and to postpone its extinction as long as possible. Thinking and read more

Reason's biological function is to preserve and promote life and to postpone its extinction as long as possible. Thinking and acting are not contrary to nature; they are, rather, the foremost features of man's nature. The most appropriate description of man as differentiated from nonhuman beings is: a being purposively struggling against the forces adverse to his life.

He who will not reason, is a bigot; he who cannot is a fool; and he who dares not is read more

He who will not reason, is a bigot; he who cannot is a fool; and he who dares not is a slave.

In matters of intellect, follow your reason as far as it will take you, without regard for any other consideration.

In matters of intellect, follow your reason as far as it will take you, without regard for any other consideration.

Propaganda...serves more to justify ourselves than to convince others; and the more reason we have to feel guilty, the more read more

Propaganda...serves more to justify ourselves than to convince others; and the more reason we have to feel guilty, the more fervent our propaganda.

Men have made an idol of luck as an excuse for their own thoughtlessness.

Men have made an idol of luck as an excuse for their own thoughtlessness.