"Religion and natural science are fighting a joint battle in an incessant, never-ending crusade against skepticism and against dogmatism, against unbelief and against superstition, and as the motto for…"

"The man who seeks to influence the course of history must not be afraid of unpopularity."

"An important scientific innovation rarely makes its way by gradually winning over and converting its opponents: it rarely happens that Saul becomes Paul. What does happen is that its opponents gradual…"

"The human mind is capable of understanding the universe."

"A new scientific truth does not triumph by convincing its opponents and making them see the light, but rather because its opponents eventually die, and a new generation grows up that is familiar with …"