G1226–διαβεβαιόω–diabebaioō

Desiring to be teachers of the law, though they have no knowledge of what they say or of the statements which they make so certainly.

διαβεβαιοῦνται. diabebaiountai “they confidently assert.”

This is a true saying; and it is my desire that you may give certain witness about these things, so that those who have had faith in God may give attention to good works. These things are good and of profit to men;

διαβεβαιοῦσθαι diabebaiousthai “to affirm strongly”