All truths are easy to understand once they are discovered; the point is to discover them.

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.

Philosophy of science is philosophy enough.

-- Willard Van Orman Quine

A theory which is not refutable by any conceivable event is non-scientific.

-- Karl Popper

Do not block the way of inquiry.

-- Charles Sanders Peirce

Rule No. 1: Never lose money. Rule No. 2: Never forget Rule No. 1.

-- Warren Buffett

An expert is a man who has made all the mistakes which can be made, in a narrow field.

-- Niels Bohr

A new scientific truth does not triumph by convincing its opponents, but rather because its opponents eventually die and a new generation grows up familiar with it.

-- Max Planck