If this instance seems incredible, what shall we say of infants?
A man of ripe age deems their nature so unlike his own, that he can only be persuaded that he too has been an infant by the analogy of other men.

However, I prefer to leave such questions undiscussed, lest I should give ground to the superstitious for raising new issues.
PROP.XL.

Whatsoever conduces to man's social life, or causes men to live together in harmony, is useful, whereas whatsoever brings discord into a State is bad.
Proof .-- For whatsoever causes men to live together in harmony also causes them to live according to reason (IV.

xxxv.), and is therefore (IV.xxvi.

xxvii.) good, and (for the same reason) whatsoever brings about discord is bad.