Matthew Poole and continuators on 1 John 1:8

8 If we say that we have no sin , we deceive our selves, and the truth is not in us .

In pursuance of which scope, he fitly adds, (if we should say] i. e. either profess it as a Principle, or think in our Minds, or not bear in our Hearts a penitential remorseful sence correspondent to the contrary apprehension; such as is imply'd in confessing, v. 9. (for saying usually signifies the habitual bent and disposition of the Heart and practice, Ioh 21.14. Ier. 22.21.)

Viz. That we are so innocent Creatures as not to need such an expiatory Sacrifice as that above mentioned, and such purifying influence thereupon, but that we may be admitted to Communion with God upon our own account, and for our worthiness sake, without being beholden to the Blood of Christ; we deceive our selves, delude our own Souls.

i. e. The System and frame of Gospel-Doctrine (as 2 Ioh. 1.2, 4.)

Cannot be duly entertain'd, lies not evenly and agreeably with its self in our Minde▪ or hath no place with effect in us, as Iohn 8.37.

Marginal references: 1 King. 8.46. 2 Chron. 6.36. Prov. 20.9. Eccl. 7.20. James 3.2.