Mankind? That Is An Abstraction.

Duty Is The Demand Of The Hour.

What You Have Inherited From Your Forefathers, It Takes Work To Make It Your Own.

The Greatest Joy Of A Thinking Man Is To Have Searched The Explored And To Quietly Revere The Unexplored.

Merely To Breathe Freely Does Not Mean To Live.

Hypotheses Are Only The Pieces Of Scaffolding Which Are Erected Round A Building During The Course Of Construction, And Which Are Taken Away As Soon As The Edifice Is Completed.