“A diamond is a piece of coal that stuck to the job”

“It is absurd to say that our country can issue $30,000,000 in bonds and not $30,000,000 in currency. Both are promises to pay; but one promise fattens the usurer (banker), and the other helps the people. If the currency issued by the Government were no good, then the bonds issued would be no good either. It is a terrible situation when the Government, to increase the national wealth, must go into debt and submit to ruinous interest charges at the hands of men who control the fictitious values of gold.”

“I know of over 3,000 ways [that] a light bulb does not work.”

“Mr. Edison worked endlessly on a problem, using the method of elimination. If a person asked him if he were discouraged because so many attempts proved unavailing, he would say, "No, I am not discouraged, because every wrong attempt discarded is another step forward.".”

“A good intention, with a bad approach, often leads to a poor result.”

“I do not understand this squeamishness about the use of gas. We have definitely adopted the position at the Peace Conference of arguing in favour of the retention of gas as a permanent method of warfare. It is sheer affectation to lacerate a man with the poisonous fragment of a bursting shell and to boggle at making his eyes water by means of lachrymatory gas.”

“I am both pleased but astonished by the fact that mankind has not yet begun to use all the means and devices that are available for destruction. I hope that such weapons are never manufactured in quantity.”

“I was armed to the teeth with a pitiful little Smith & Wesson's seven-shooter, which carried a ball like a homopathic pill, and it took the whole seven to make a dose for an adult. But I thought it was grand. It appeared to me to be a dangerous weapon. It had only one fault - you could not hit anything with it.”

“Is this the generation of love? Hot blood, hot thoughts and hot deeds? Why, they are vipers. Is love a generation of vipers?”

“You must not thinkThat we are made of stuff so fat and dullThat we can let our beard be shook with dangerAnd think it pastime.”

“He thinks too much. Such men are dangerous.”

“To do a great right do a little wrong.”

“For I can raise no money by vile means. By heaven, I had rather coin my heart, And drop my blood for drachmas”

“Profit is a blessing, if it's not stolen.”

“My grief lies onward, and my joy behind.”

“O! that a man might know The end of this day's business, ere it come; But it sufficeth that the day will end, And then the end is known.”

“The bitter past, more welcome is the sweet.”

“Whenever a true theory appears, it will be its own evidence. Its test is, that it will explain all phenomena.”

“The Good Spirit never cared for the colleges, and though all men and boys were now drilled in Greek, Latin, and Mathematics, it had quite left these shells high on the beach, and was creating and feeding other matters [science] at other ends of the world.”

“Every known fact in natural science was divined by the presentiment of somebody, before it was actually verified.”

“The machine unmakes the man. Now that the machine is so perfect, the engineer is nobody.”

“Railroad iron is a magician's rod, in its power to evoke the sleeping energies of land and water.”

“Man moves in all modes, by legs of horses, by wings of winds, by steam, by gas of balloon, by electricity, and stands on tiptoe threatening to hunt the eagle in his own element.”