I Never Failed. It Just Didn't Work

Every Wrong Attempt Discarded Is Another Step Forward

The Doctor Of The Future Will Give No Medicine, But Will Involve The Patient In The Proper Use Of Food, Fresh Air And Exercise

I Never Quit Until I Get What I Want.

The Successful Person Makes A Habit Of Doing What The Failing Person Doesn't Like To Do.

I Would Construct And Work Along Various Lines Until I Found Them Untenable. When One Theory Was Discarded, I Developed Another At Once. I Realized Very Early That This Was The Only Possible Way For Me To Work Out All The Problems.