If we confess our sins, he is faithful and just to forgive us our sins and to cleanse us from all unrighteousness. (ESV)

If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness. (KJV)

Greek: ἐὰν ὁμολογῶμεν τὰς ἁμαρτίας ἡμῶν, πιστός ἐστιν καὶ δίκαιος, ἵνα ἀφῇ ἡμῖν τὰς ἁμαρτίας καὶ καθαρίσῃ ἡμᾶς ἀπὸ πάσης ἀδικίας.

Transliterated Greek: ean homologōmen tas hamartias hēmōn, pistos estin kai dikaios, hina aphē hēmin tas hamartias kai katharisē hēmas apo pasēs adikias.

Literal Word for Word Translation: if we confess our sins, he is faithful and just, so that he will forgive us our sins and will cleanse us from all unrighteousness.

Vocab: ὁμολογῶμεν, homologōmen, we might confess/agree/speak the same; ἁμαρτίας, hamartias, sins; πιστός, pistos, faithful; δίκαιος, dikaios, righteous/just; ἀφῇ, aphē, he might forgive/send away; καθαρίσῃ, katharisē, he might cleanse; ἀδικίας, adikias, unrighteousness.

Commentary: The central message of the gospel! If only the Gnostics and those who say we have no sin would understand. If we WILL confess our sins, meaning agree with God that they are sins against His holy character, then He WILL, in His faithfulness, forgive us our sins (send them away), and make us as white as snow, like the pure brilliant light which came into the world and gave His life, for us so that we may have life eternal. If we deny that we have sin, there is nothing for God to forgive and cleanse us of. It is like the alcoholic or drug addict who denies he has a problem. With no problem, there is nothing to make right and the addict stays in his condition. However, the day the deception ceases and the truth is revealed, the darkness subsides and the sun rises, the problem is then seen in its full destructive ugliness, which must be buried so that it does not have to be seen anymore, so that a new life can emerge. Hallelujah!