... All that we may ever hope to establish in historical research are facts and conditions but never causes.

There is a much higher probability that a first-class scholar should commit an error than that an author who usually writes nonsense should have one good idea.

No one has yet invented a system of education that is capable of ruining everyone.

It seems to me that all the evidence points to Apollonius as the founder of Greek mathematical astronomy.

... All that we may ever hope to establish in historical research are facts and conditions but never causes.