“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.”

“You taught me language, and my profit on't / Is, I know how to curse”

“Those that do teach young babesDo it with gentle means and easy tasks.”

“Thought and knowledge are natures in which apparatus and pretension avail nothing. Gowns, and pecuniary foundations, though of towns of gold, can never countervail the least sentence or syllable of wit. Forget this, and out American colleges will recede in their public importance whilst they grow richer every year.”

“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.”

“To wilful men, the injuries that they themselves procure must be their schoolmasters.”

“I hourly learn a doctrine of obedience.”

“Experience is by industry achieved, And perfected by the swift course of time.”

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

“There are two processes which we adopt consciously or unconsciously when we try to prophesy. We can seek a period in the past whose conditions resemble as closely as possible those of our day, and presume that the sequel to that period will, save for some minor alterations, be similar. Secondly, we can survey the general course of development in our immediate past, and endeavor to prolong it into the near future. The first is the method the historian; the second that of the scientist. Only the second is open to us now, and this only in a partial sphere.”

“We know enough to be sure that the scientific achievements of the next fifty years will be far greater, more rapid, and more surprising, than those we have already experienced. ... Wireless telephones and television, following naturally upon the their present path of development, would enable their owner to connect up to any room similarly equipped and hear and take part in the conversation as well as if he put his head in through the window.”

“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.”