Who said “A study of the history of opinion is a necessary preliminary to the emancipation of the…”?

“Where an opinion is general, it is usually correct.”

“The foolish and the dead alone never change their opinions.”

“Opinions cannot survive if one has no chance to fight for them.”

“We accumulate our opinions at an age when our understanding is at its weakest.”

“Do not fear to be eccentric in opinion, for every opinion now accepted was once eccentric.”

“In the long run we are all dead.”

“Nothing mattered except states of mind, chiefly our own.”

“It is ideas, not vested interests, which are dangerous for good or evil.”

“Words ought to be a little wild for they are the assaults of thought on the unthinking.”

“Most men love money and security more, and creation and construction less, as they get older.”

“I do not know which makes a man more conservative -- to know nothing but the present, or nothing but the past.”