Wisdom vi. 16.  Compare the saying in Clem. Alex. Quis dives salvetur? § 31:  αὐτὸν ζητεῖν τοὺς εὖ πεισομένους ἀξίους τε ὄντας τοῦ Σωτῆρος μαθητάς.  The Jerusalem Editor quotes from Origen (Prolog. in Cantic.) a passage which may have been known to Cyril:  “This Comforter therefore goeth about seeking if He may discover any worthy and receptive souls to whom He may reveal the greatness of the love which is in God.”