The Only Real Valuable Thing Is Intuition.

The True Definition Of Madness Is Repeating The Same Action, Over And Over, Hoping For A Different Result.

All Our Thinking Is Of This Nature, A Free Play With Concepts.

A Model Should Be As Simple As It Can Be But No Simpler

It Would Be Better If You Began To Teach Others Only After You Yourself Have Learned Something.

Insofar As We May At All Claim That Slavery Has Been Abolished Today, We Owe Its Abolition To The Practical Consequences Of Science