Who said “Invention flags, his brain goes muddy, and black despair succeeds brown study.”?

“Stung by the splendor of a sudden thought.”

“Had it not been for you, I should have remained what I was when we first met, a prejudiced, narrow-minded being, with contracted sympathies and false knowledge, wasting my life on obsolete trifles, and utterly insensible to the privilege of living in this wondrous age of change and progress.”

“The greatest inspiration is often born of desperation.”

“My sole inspiration is a telephone call from a director.”

“There never was a great soul that did not have some divine inspiration.”

“Uncertainty and expectation are the joys of life.”

“I know that's a secret, for it's whispered everywhere.”

“I find we are growing serious, and then we are in great danger of being dull.”

“Blessings ever wait on virtuous deeds, and though a late, a sure reward succeeds.”

“If there's delight in love, 'Tis when I see that heart, which others bleed for, bleed for me.”

“They come together like the Coroner's Inquest, to sit upon the murdered reputations of the week.”