It Is With Logic That One Proves;

Every Good Mathematician Should Also Be A Good Chess Player And Vice Versa.

For A Long Time The Objects That Mathematicians Dealt With Were Mostly Ill-defined; One Believed One Knew Them, But One Represented Them With The Senses And Imagination; But One Had But A Rough Picture And Not A Precise Idea On Which Reasoning Could Take Hold.

Zero Is The Number Of Objects That Satisfy A Condition That Is Never Satisfied. But As Never Means "in No Case", I Do Not See That Any Progress Has Been Made.

One Does Not Ask Whether A Scientific Theory Is True, But Only Whether It Is Convenient.

It Is Far Better To Foresee Even Without Certainty Than Not To Foresee At All.