2 Peter 1:9

9. But For; enforcing 2 Peter 1:8 from the contrary view.

He that lacketh these things Literally, To whom these things are not present; making a sharp contrast with be in you, in 2 Peter 1:8. They should supplement faith, but do not.

Is blind To God’s law of holiness, and self-blinded by his own neglect. Cannot see afar off Literally, is near-sighted. He sees only things near by as the present moment and personal gratification; and constant looking at objects close to the eyes destroys the power of seeing those at a distance.

And hath forgotten… purged Literally, Having received forgetfulness of the purification of his former sins. The simple falling out of memory of so momentous an event as the soul’s cleansing from sin, is sad; but here is lethean forgetfulness inflicted by a judicial hand.

So backsliders sometimes come to deny that they were ever pardoned.