The Remembrance Of Past Misery Is Sweet.

That Which Is Usually Called Dotage Is Not The Weak Point Of All Old Men, But Only Of Such As Are Distinguished By Their Levity.

Never Injure A Friend, Even In Jest.

All Action Is Of The Mind And The Mirror Of The Mind Is The Face, Its Index The Eyes.

If Nature Does Not Ratify Law, Then All The Virtues May Lose Their Sway.

The Following Passage Is One Of Those Cited By Copernicus Himself In His Preface To De Revolutionibus: "the Syracusan Hicetas, As Theophrastus Asserts, Holds The View That The Heaven, Sun, Moon, Stars, And In Short All Of The Things On High Are Stationary, And That Nothing In The World Is In Motion Except The Earth, Which By Revolving And Twisting Round Its Axis With Extreme Velocity Produces All The Same Results As Would Be Produced If The Earth Were Stationary And The Heaven In Motion. . . ."