"If we say we have no sin..."

Two brief quotes of 1 John are often used to claim, falsely, that Christians cannot stop sinning.

But those quotes refer to the universal condition of all humanity, namely sin-slavery, that necessitated Jesus being born and dying to pay the ransom. That is what is undeniable.

"If we say that we have no sin, we deceive ourselves, and the truth is not in us. " (1 John 1:8, NKJV)

"If we say that we have not sinned, we make Him a liar, and His word is not in us. " (1 John 1:10, NKJV)

The context clearly shows that the author believes that Christians can indeed refrain from sinning.

"Whoever commits sin also commits lawlessness, and sin is lawlessness. And you know that He was manifested to take away our sins, and in Him there is no sin. Whoever abides in Him does not sin. Whoever sins has neither seen Him nor known Him. Little children, let no one deceive you. He who practices righteousness is righteous, just as He is righteous. He who sins is of the devil, for the devil has sinned from the beginning. For this purpose the Son of God was manifested, that He might destroy the works of the devil. Whoever has been born of God does not sin, for His seed remains in him; and he cannot sin, because he has been born of God." (1 John 3:4-10, NKJV)