We must not overlook the role that extremists play. They are the gadflies that keep society from being too complacent.

The student is to collect and evaluate facts. The facts are locked up in the patient.

Nations have recently been led to borrow billions for war; no nation has ever borrowed largely for education... no nation is rich enough to pay for both war and civilization. We must make our choice; we cannot have both.

We must not overlook the role that extremists play. They are the gadflies that keep society from being too complacent or self-satisfied; they are, if sound, the spearhead of progress. If they are fundamentally wrong, free discussion will in time put an end to them.

Science, in the very act of solving problems, creates more of them.

The world in which we live is the only world about which our senses can testify.

A patient had a 50-50 chance of benefiting from visiting a physician as of 1910. Medicine was more like voodoo than science until the 20th Century.