If we say that we have not sinned: see 1 John 1:8,9. We make him a liar; which they make him that believe not his word, 1 John 5:10, expressly charging all men with sin, Romans 3:19,23. And, consequently, his word, or truth, as 1 John 1:8, which we contradict, is not in us. The sum is: That we are not to he received into God's holy society and communion under the notion of always innocent and unoffending persons, but as pardoned and purified sinners.
Related Commentaries of 1 John 1:10
1 John 1:10
10 If we say that we have not sinned, we make him a liar, and his word is not in us.