Michel de Montaigne

A wise man sees as much as he ought, not as much as he can.

He who establishes his argument by noise and command shows that his reason is weak.

Rejoice in the things that are present; all else is beyond thee.

But with each passing year and each new study, the evidence for the genetic contribution to individual and group differences becomes more firmly established than ever.

A teacher must believe in the value and interest of his subject as a doctor believes in health.