κατὰ τὸν αὑτοῦ δαίμονα βιοῦν → live under the direction of his own guiding spirit
P. and V. εὐήθως, Ar. and P. ἀνοήτως, P. μώρως (Xen.); see foolishly.
ridiculously: P. ἀτόπως, γελοίως, καταγελάστως.