κατόπισθεν
From LSJ
κοινὸν τύχη, γνώμη δὲ τῶν κεκτημένων → good luck is anyone's, judgment belongs only to those who possess it
English (LSJ)
in Poets also κάτ-θε, Adv. of Place,
A behind, after, Il.23.505, Od.22.92: c.gen., 12.148, Pancrat.Oxy.1085.14: metaph., of rank, ἁ δ' Ἀρετὰ κ. θνατοῖς ἀμελεῖται E.IA1093 (lyr.). II of Time, hereafter, afterwards, henceforth, Od.22.40, 24.546; ὁ κ. λογισμός Pl.Ti.57e, cf. Thgn.280; also κ. λιποίμην Od.21.116, cf. Pl.R. 363d.