I John 1:9 & 10
9 If we confessour sins, He isfaithful and justto forgive us our sins and to cleanse us from all unrighteousness. [kjv]
10If we say that we have not sinned, we make him a liar, and his word is not in us. [kjv]
Treasury of Scriptural Knowledge
1Jn 1:9 we confess. Lev 26:40-42; *1Ki 8:47; 2Ch 6:37-38; Ne 1:6; 9:2-37; Job 33:27-28; Ps 32:5; *51:2-5; *Pr 28:13; Da 9:4-20; Mt 3:6; Mk 1:5; *Ac 19:18 he is. *Dt 7:9; La 3:23; 1Co 1:9; 1Ti 1:15; *Heb 10:23; 11:11 just. Isa 45:21; *Zec 9:9; *Ro 3:26; Heb 6:10; Rev 15:3 and to. 7; Ps 19:12; 51:2; Je 33:8; Eze 36:25; 37:23; *1Co 6:11; *Ep 5:26; *Tit 2:14
1Jn 1:10 we say. 8; Ps 130:3 we make. 5:10; Job 24:25 his word. 8; 2:4; 4:4; Col 3:16; 2Jn 2
[NLTSBN] 1Jn 1:9 To maintain continual fellowship with God, we need to confess our sins to him. Forgiveness and cleansing are guaranteed because God is faithful to his promises and because he acts on the basis of his justice. Christ’s death for our sins fulfills God’s justice and acquits us of our guilt.
[NLTSBN]1Jn 1:10 If we claim we have not sinned, we are calling God a liar: God’s word emphasizes the permeating and penetrating nature of sin (see note on 1:8).
[NTSBN] 1Jn 1:8 If we claim we have no sin:This is the second false claim of the Gnostics (see 1:6). They claimed that they were or could be sinless since Christ had abolished their sins once and for all—their higher knowledge would lift them above the realm of sin. But Christians do still sin when they live in their old nature (see Ro 7:14-25). The true Christian both acknowledges this sin (1:9) and trusts in Christ to take it away.
[NTSBN] 1Jn 1:6 This is the first of several instances in which John challenges the claims of the Gnostics, who had broken away from the apostolic fellowship and were thus living in spiritual darkness. They claimed to have fellowship with God but did not express his character, which is light. Jesus had warned the Jewish leaders of his day not to let the light they thought they had be darkness (Mt 6:23)—their religious beliefs had blinded them to the spiritual illumination they could have received from Christ. In like manner, these Gnostic teachers thought they were enlightened but were actually darkened by their so-called illuminations. They claimed to have spiritual experiences from God, yet they rejected fellowship with the ones who had actually seen God in the flesh, John and the other apostles.
[AMP]9If we [freely] admit that we have sinned and confess our sins, He is faithful and just [true to His own nature and promises], and will forgive our sins and cleanse us continually from all unrighteousness [our wrongdoing, everything not in conformity with His will and purpose].
[AMP] 10If we say that we have not sinned [refusing to admit acts of sin], we make Him [out to be] a liar [by contradicting Him] and His word is not in us.