"The disparagement of empirical evidence in favor of a metaphysical world of illusion has its origin in the conflict b…"

"The characteristic activity of science is not construction, but induction. The more often something has occurred in t…"

"At present, when the prevailing forms of society have become hindrances to the free expression of human powers, it is…"

"A man discovers what he is actually worth in this world when he faces society as a man, without money, name, or power…"

"Although the formulations of science now offer the most advanced knowledge of nature, men continue to use obsolete fo…"

"Thought must be judged by something that is not thought, by its effect on production or its impact on social conduct,…"

"If by enlightenment and intellectual progress we mean the freeing of man from superstitious belief in evil forces, in…"

"The concept of God was for a long time the place where the idea was kept alive that there are other norms besides tho…"

"The complexity of the connection between the world of perception and the world of physics does not preclude that such…"

"No criticism can be brought against a branch of technical science from outside; no thought fitted out with the knowle…"