Scientific truth is beyond loyalty and disloyalty.

During the century after Newton, it was still possible for a man of unusual attainments to master all fields of scientific knowledge. But by 1800, this had become entirely impracticable.

A subtle thought that is in error may yet give rise to fruitful inquiry that can establish truths of great value.

Having no unusual coincidence is far more unusual than any coincidence could possibly be.

Even as a youngster, though, I could not bring myself to believe that if knowledge presented danger, the solution was ignorance. To me, it always seemed that the solution had to be wisdom. You did not refuse to look at danger, rather you learned how to handle it safely.

There never can be a man so lost as one who is lost in the vast and intricate corridors of his own lonely mind, where none may reach and none may save.

To surrender to ignorance and call it God has always been premature, and it remains premature today.