I am confident of my ability to demonstrate that one can sometimes believe in something and yet not believe in it. Nothing is less fathomable than the systems that motivate our actions.

Men still have to be governed by deception.

A good method of discovery is to imagine certain members of a system removed and then see how what is left would behave: for example, where would we be if iron were absent from the world: this is an old example.

One has to do something new in order to see something new.

Everyone is a genius at least once a year.

Honest unaffected distrust of human abilities under all circumstances is the surest sign of strength of mind.

Just as there are polysyllabic words that say very little, so there are also monosyllabic words of infinite meaning.