Galileo Galilei

I think that in the discussion of natural problems we ought to begin not with the Scriptures, but with experiments, and demonstrations. ”

Nature is relentless and unchangeable, and it is indifferent as to whether its hidden reasons and actions are understandable to man or not. ”

Facts which at first seem improbable will, even on scant explanation, drop the cloak which has hidden them and stand forth in naked and simple beauty. ”

The nature of the human mind is such that unless it is stimulated by images of things acting upon it from without, all remembrance of them passes easily away. ”