“Orthodox Marxism, therefore, does not imply the uncritical acceptance of the results of Marx’s investigations. It is not the ‘belief’ in this or that thesis, nor the exegesis of a ‘sacred’ book. On the contrary, orthodoxy refers exclusively to method. It is the scientific conviction that dialectical materialism is the road to truth and that its methods can be developed, expanded and deepened only along the lines laid down by its founders. It is the conviction, moreover, that all attempts to surpass or ‘improve’ it have led and must lead to over-simplification, triviality and eclecticism.”

“Just as the dignity of man is based on his freedom--to the extent that he may even say no to God--likewise, the dignity of a science is based on that unconditional freedom which guarantees its independent search for truth. And just as human freedom must include the freedom to say no, so the freedom of scientific investigation must face the risk that its results will turn out to contradict religious beliefs and convictions. Only a scientist who is ready to fight militantly for such an autonomy of thought may triumphantly live to see how the results of his research eventually fit, without contradictions, in the truths of his belief.”

“Religions are all living faiths and their essence does not consist in their externals such as rituals, methods of prayer, ceremonies, etc. It rather consist in the inner beliefs and convictions which they carry along with them and which give their followers a distinctive character and way of life.”

“Belief, in one of its accepted senses, may consist in a merely intellectual assent, while faith implies such confidence and conviction as will impel to action.”

“Youth can only assert itself through the conviction that its ventures surpass all others and resemble nothing.”

“[Chemist Michael] Polanyi found one other necessary requirement for full initiation into science: Belief. If science has become the orthodoxy of the West, individuals are nevertheless still free to take it or leave it, in whole or in part; believers in astrology, Marxism and virgin birth abound. But "no one can become a scientist unless he presumes that the scientific doctrine and method are fundamentally sound and that their ultimate premises can be unquestionably accepted.”