Insight Must Precede Application.

A New Truth Always Has To Conend With Many Difficulties. If It Were Not So, It Would Have Been Discovered Much Sooner.

A Scientific Truth Does Not Triumph By Convincing Its Opponents And Making Them See The Light, But Rather Because Its Opponents Eventually Die And A New Generation Grows Up That Is Familiar With It.

The Man Who Cannot Occasionally Imagine Events And Conditions Of Existence That Are Contrary To The Causal Principle As He Knows It Will Never Enrich His Science By The Addition Of A New Idea.

It Is Never Possible To Predict A Physical Occurrence With Unlimited Precision.

The Quantum Hypothesis Will Eventually Find Its Exact Expression In Certain Equations Which Will Be A More Exact Formulation Of The Law Of Causality.