If the Nation can issue a dollar bond it can issue a dollar bill. The element that makes the bond good makes the bill good also. The difference between the bond and the bill is that the bond lets the money broker collect twice the amount of the bond and an additional 20%. Whereas the currency, the honest sort provided by the Constitution pays nobody but those who contribute in some useful way. It is absurd to say our Country can issue bonds and cannot issue currency. Both are promises to pay, but one fattens the usurer and the other helps the People.

Negative results are just what I want. They’re just as valuable to me as positive results. I can never find the thing that does the job best until I find the ones that don’t.

The entity that gives life and motion to the human body is finer still and lies infinitely beyond the reach of our finest scientific instruments. When this entity deserts the body, the body is like a ship without a rudder - deserted, motionless, dead.

Education isn't play--and it can't be made to look like play. It is hard, hard work. But it can be made interesting work.

Success depends on how many experiments you can fit into 24 hours

I am more of a sponge than an inventor. I absorb ideas from every source. I take half-matured schemes for mechanical development and make them practical. I am a sort of a middleman between the long-haired and impractical inventor and the hard-headed business man who measures all things in terms of dollars and cents. My principal business is giving commercial value to the brilliant but misdirected ideas of others.

Sleep is like a drug. Take too much at a time and it makes you dopey. You lose time and opportunities.