Reasoning draws a conclusion, but does not make the conclusion certain, unless the mind discovers it by the path of experience.

All science requires mathematics. The knowledge of mathematical things is almost innate in us. This is the easiest of sciences, a fact which is obvious in that no one's brain rejects it; for laymen and people who are utterly illiterate know how to count and reckon.

Argument is conclusive, but it does not remove doubt, so that the mind may rest in the sure knowledge of the truth, unless it finds it by the method of experiment.

For the things of this world cannot be made known without a knowledge of mathematics.

Every theory presented as a scientific concept is just that; it's a theory that tries to explain more about the world than previous theories have done. It is open to being challenged and to being proven incorrect.

I was always very interested in science, and I knew that for me, science was a better long-term career than tennis.

Frequently, I have been asked if an experiment I have planned is pure or applied research; to me, it is more important to know if the experiment will yield new and probably enduring knowledge about nature.

Ridley Scott's 'Prometheus' is a magnificent science-fiction film, all the more intriguing because it raises questions about the origin of human life and doesn't have the answers.