Mathematics is the alphabet in which God has written the universe.

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

Measure what is measurable, and make measurable what is not so.

Plato is my friend, Aristotle is my friend, but my greatest friend is truth.

-- Isaac Newton

Truth is sought for its own sake. And those who are engaged upon the quest for anything for its own sake are not interested in other things.

-- Ibn al-Haytham