"Opinions derived from long experience are exceedingly valuable."
An opinion is a judgement, viewpoint, or statement that is not conclusive, as opposed to facts, which are true statements.
"A mans opinion on tramcars matters; his opinion on Botticelli matters; his opinion on all things does not matter. He may turn over and explore a million objects, but he must not find that strange object, the universe; for if he does he will have a religion, and be lost. Everything matters — except everything."
"With books and money placed, for show Like nest eggs, to make clients lay, And for his false opinion pay."
"We are complex, and therefore, in our natural state, inconsistent, beings, and the opinion of this hour need not be the opinion of the next."
"The world is governed much more by opinion than by laws. It is not the judgment of courts, but the of individuals and masses of men, which is the wall of defense around property and life."
"Genuine belief ended with persecution. As soon as it was felt that to punish a man for maintaining an independent opinion was shocking and unjust, so soon a doubt had entered whether the faith established was unquestionably true."
"Consider that everything is opinion, and opinion is in thy power."