And being fully persuaded that, what he had promised, he was able also to perform.
being fully persuaded that God had power to do what he had promised.
καὶ πληροφορηθεὶς ὅτι ὃ ἐπήγγελται, δυνατός ἐστιν καὶ ποιῆσαι.
kai plērophorētheis oti o epēggeltai, dynatos estin kai poiēsai.