Opinion (n.) is weak knowledge, at home with what is false or unknown.
Opinion (n.) may differ not only between friends but within one man at different times.
Opinion (n.) is allowed the wise man, said Catulus, so long as he knows it is only opinion.
Opinion (n.) does not die with the men who held it, though it may miss its author's explanation.
Opinion (n.) is always reason at work: right reason when it conforms to truth, wrong reason when it does not.
Opinion (n.) is how the unwise man sails, steering by the broad Bear rather than the precise little star, and so wandering on a freer course.
Opinion (n.) is something a man might never hold at all — Arcesilaus was the first to say so, and to say that for the wise man it is indispensable never to hold it.