"If a man deceives me once, shame on him; if he deceives me twice, shame on me."

"I have no belief in the perfectibility of human nature."

"Who has not, a hundred times, found himself committing a vile or a silly action for no other reason than because he knows he should not?"

"I have often thought that the sole regret of the transformed butterfly must be that it can only live for a day."

"He [Longfellow] was guilty of 'the most barbarous class of literary robbery.'"