Τὸ γὰρ περισσὰ πράσσειν οὐκ ἔχει νοῦν οὐδένα → There is no sense in doing things beyond the usual measure
summŏpĕre: v. summus, under superus.
summŏpĕrĕ, adv. (summus, opus), avec le plus grand soin : Cic. Inv. 1, 66.