γελᾷ δ' ὁ μωρός, κἄν τι μὴ γέλοιον ᾖ → the fool laughs even when there's nothing to laugh at
P. and V. εὔκοσμος, κόσμιος, Ar. and P. εὔτακτος.
in an orderly way: Ar. and P. κοσμίως, P. and V. εὐτάκτως, P. τεταγμένως.