“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.”

“O teach me how I should forget to think (1.1.224)”

“The learned and the studious of thought have no monopoly of wisdom. Their violence of direction in some degree disqualifies them to think truly.”

“Do not craze yourself with thinking, but go about your business anywhere.”

“The one prudence in life is concentration; the one evil is dissipation: and it makes no difference whether our dissipations are coarse or fine; property and its cares, friends and a social habit, or politics, or music, or feasting. Everything is good which takes away one plaything and delusion more, and drives us home to add one stroke of faithful work.”

“Concentration is the secret of srength.”

“How much more the seeker of abstract truth, who needs periods of isolation, and rapt concentration, and almost a going out of thebody to think!”

“Nor age so eat up my invention.”

“Ideas are the very coinage of your brain.”

“Where art thou, Muse, that thou forget'st so long / To speak of that which gives thee all thy might?”

“Therefore I tell my sorrows to the stones; Who, though they cannot answer my distress, Yet in some sort they are better than the tribunes, For that they will not intercept my tale: When I do weep, they humbly at my feet Receive my tears and seem to weep with me; And, were they but attired in grave weeds, Rome could afford no tribune like to these.”

“I and my bosom must debate awhile, and then I would no other company.”

“I have been studying how I may compare This prison where I live unto the world; And, for because the world is populous, And here is not a creature but myself, I cannot do it. Yet I'll hammer it out.”