Interest Is The Invention Of Satan.

Work While Others Are Wishing.

Discontent Is The First Necessity Of Progress.

X-rays ... I Am Afraid Of Them. I Stopped Experimenting With Them Two Years Ago, When I Came Near To Losing My Eyesight And Dally, My Assistant Practically Lost The Use Of Both Of His Arms.

I Did Not Fail Two Thousand Times. I Merely Found Two Thousand Ways Not To Make A Lightbulb.

I Think That Ingersoll Had All The Attributes Of A Perfect Man, And, In My Opinion, No Finer Personality Ever Existed. Judging From The Past, I Cannot Help Thinking That The Intention Of The Supreme Intelligence That Rules The World Is To Ultimately Make Such A Type Of Man Universal.