He (Cato) never gave his opinion in the Senate upon any other point whatever, without adding these words, "And, in my opinion Carthage should be destroyed." ["Delenda est Carthago."]
PlutarchIt is a thing of no great difficulty to raise objections against another man's oration, it is a very easy matter; but to produce a better in it's place is a work extremely troublesome.
Plutarch... being perpetually charmed by his familiar siren, that is, by his geometry, he neglected to eat and drink and took no care of his person; that he was often carried by force to the baths, and when there he would trace geometrical figures in the ashes of the fire, and with his finger draws lines upon his body when it was anointed with oil, being in a state of great ecstasy and divinely possessed by his science.
Plutarch