"Men are not more zealous for truth than they often are for error, and a sufficiently frequent repetition of error, if not contradicted, passes for truth."

"Originality is the one thing which unoriginal minds cannot feel the use of."

"The sole end for which mankind are warranted, individually or collectively, in interfering with the liberty of action of any of their number, is self-protection."

"It is questionable if all the mechanical inventions yet made have lessened the toil of any human being."

"The human faculties of perception, judgment, discriminative feeling, mental activity, and even moral preference, are exercised only in making a choice."