. "But in order to judge of affections, whencesoever they arise, that is, by whatever opinions they are excited, the only rule is, to compare sedately the pleasure with the pain they bring; according to the sage maxim, which indeed contains the whole of wisdom. ???Nocet empta dolore voluptas.???25 If there be any such thing as wisdom or prudence this must be its measure; for there can be no other ult" . . . .