Don't Give Us Your Doubts, Gives Us

Hypotheses Are The Scaffolds Which Are Erected In Front Of A Building And Removedd When The Building Is Completed. They Are Indispensable To The Worker; But The Worker Must Not Mistake The Scaffolding For The Building.

One That Does Not Think To Highly Of Himself Is More Than He Thinks.

The Present Is A Powerful Deity. [ger., Die Gegenwart Ist Eine Machtige Gottin.]

My Worthy Friend, Gray Are All Theories And Green Alone Life's Golden Tree.

The Highest Goal That Man Can Achieve Is Amazement.