2 Peter 1:12 - Matthew Poole's English Annotations on the Holy Bible

I will not be negligent; i.e. I will be diligent and careful. Though ye know them: he prevents an objection; q.d. Though ye know these things already, yet being things of great moment, and you being beset with temptations, encompassed about with infirmities, and, while you are on the earth, being in a land of forgetfulness, it is necessary to put you in mind of what you know, that ye may remember to do it. See the like, Romans 15:14,15 1 John 2:21. The present truth; the truth of the gospel now revealed to you; that which was the great subject of the apostles preaching and writings, that Jesus Christ was the Christ; that redemption was wrought by him; that he was risen from the dead; that whosoever believeth on him, should receive remission of sins, &c.; the promise made to the fathers being now fulfilled, Acts 13:32,33, and what was future under the Old Testament being present under the New.