To be humane, we must ever be ready to pronounce that wise, ingenious and modest statement 'I do not know'.

If you could see the earth illuminated when you were in a place as dark as night, it would look to you more splendid than the moon.

God is known by nature in his works, and by doctrine in his revealed word.

Take note, theologians, that in your desire to make matters of faith out of propositions relating to the fixity of sun and earth you run the risk of eventually having to condemn as heretics those who would declare the earth to stand still and the sun to change position-eventually, I say, at such a time as it might be physically or logically proved that the earth moves and the sun stands still.

The laws of Nature are written in the language of mathematics...the symbols are triangles, circles and other geometrical figures, without whose help it is impossible to comprehend a single word.

In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual.

Knowing thyself, that is the greatest wisdom.