With Regards To Political Enemies Plato Had

[great Scientists] Are Men Of Bold Ideas, But Highly Critical Of Their Own Ideas: They Try To Find Whether Their Ideas Are Right By Trying First To Find Whether They Are Not Perhaps Wrong. They Work With Bold Conjectures And Severe Attempts At Refuting Their Own Conjectures.

If We Wish Our Civilization To Survive We Must Break With The Habit Of Deference To Great Men.

Our Knowledge Can Only Be Finite, While Our Ignorance Must Necessarily Be Infinite.

The Metaphysical Doctrine Of Determinism Simply Asserts That All Events In This World Are Fixed, Or Unalterable, Or Predetermined. It Does Not Assert That They Are Known To Anybody, Or Predictable By Scientific Means. But It Asserts That The Future Is As Little Changeable As Is The Past. Everybody Knows What We Mean When We Say That The Past Cannot Be Changed. It Is In Precisely The Same Sense That The Future Cannot Be Changed, According To Metaphysical Determinism.

If We Are Not Prepared To Defend A Tolerant Society Against The Onslaught Of The Intolerant, Then The Tolerant Will Be Destroyed, And Tolerance With Them.