Plato Used To Say To Xenocrates The

Democritus Said, Words Are But The Shadows Of Actions.

Nothing Exists In The Intellect That Has Not First Gone Through The Senses.

A Remorseful Change Of Mind Renders Even A Noble Action Base, Whereas The Determination Which Is Grounded On Knowledge And Reason Cannot Change Even If Its Actions Fail.

There Are Two Sentences Inscribed Upon The Ancient Oracle... "know Thyself" And "nothing Too Much"; And Upon These All Other Precepts Depend.

This Excerpt Is Presented As Reproduced By Copernicus In The Preface To De Revolutionibus: "some Think That The Earth Remains At Rest. But Philolaus The Pythagorean Believes That, Like The Sun And Moon, It Revolves Around The Fire In An Oblique Circle. Heraclides Of Pontus And Ecphantus The Pythagorean Make The Earth Move, Not In A Progressive Motion, But Like A Wheel In Rotation From West To East Around Its Own Center."