What is the Book of 2 Peter about?

Understanding 2 Peter 1:3

2 Peter is a testament — quite literally a last will and testament. The apostle Peter, knowing his death is imminent ('I know that I will soon put aside the body of this tent, as our Lord Jesus Christ has made clear to me' — 1:14), writes with the urgency of a man who has one final message to deliver. That message is twofold: grow in the true knowledge of Christ, and beware of false teachers who will try to lead you astray. It is the most personally charged and eschatologically intense of the General Epistles.

Author and occasion

2 Peter identifies itself as from 'Simon Peter, a servant and apostle of Jesus Christ' (1:1). The author claims to have been present at the Transfiguration (1:16-18) and identifies this as his 'second letter' (3:1, referencing 1 Peter). He also mentions Paul's letters as Scripture (3:15-16) — a remarkable early testimony to the authority of Paul's writings.

The letter's authenticity was debated even in the early church — it was the last New Testament book to receive universal acceptance. The style differs significantly from 1 Peter, leading some scholars to attribute it to a later author writing in Peter's name. Others explain the differences through the use of a different secretary (amanuensis) — Silvanus for 1 Peter (1 Peter 5:12), someone else for 2 Peter — or through Peter writing 2 Peter himself without secretarial polish.

Regardless of the authorship debate, the book addresses a concrete and recurring problem: false teachers who deny Christ's return and use that denial to justify immoral behavior.

Structure

Chapter 1: Growing in godliness

Peter opens with a magnificent statement about divine provision: 'His divine power has given us everything we need for a godly life through our knowledge of him who called us by his own glory and goodness' (1:3). God's power is not merely available — it has already given everything needed. The resources are present; believers must apply them.

This leads to the famous 'ladder of virtues' (1:5-7): 'Make every effort to add to your faith goodness; and to goodness, knowledge; and to knowledge, self-control; and to self-control, perseverance; and to perseverance, godliness; and to godliness, mutual affection; and to mutual affection, love.' This is not a sequential checklist but an interconnected web of qualities that grow together. Faith produces goodness, which deepens knowledge, which strengthens self-control, which enables perseverance, which cultivates godliness, which generates affection, which matures into love.

Peter grounds his authority in eyewitness testimony: 'We did not follow cleverly devised stories when we told you about the coming of our Lord Jesus Christ in power, but we were eyewitnesses of his majesty' (1:16). He describes the Transfiguration — 'He received honor and glory from God the Father when the voice came to him from the Majestic Glory, saying, "This is my Son, whom I love; with him I am well pleased"' (1:17). Peter was there. He heard the voice. He saw the glory.

But even eyewitness testimony points to something more reliable: 'We also have the prophetic message as something completely reliable, and you will do well to pay attention to it, as to a light shining in a dark place' (1:19). Scripture is more certain than even firsthand experience because it comes from God: 'Prophecy never had its origin in the human will, but prophets, though human, spoke from God as they were carried along by the Holy Spirit' (1:21). This verse is one of the foundational texts for the doctrine of biblical inspiration.

Chapter 2: The false teachers

Chapter 2 is one of the most intense denunciations in the New Testament — rivaling Jude (with which it shares substantial material). Peter warns that false teachers will arise within the church:

'They will secretly introduce destructive heresies, even denying the sovereign Lord who bought them... Many will follow their depraved conduct and will bring the way of truth into disrepute. In their greed these teachers will exploit you with fabricated stories' (2:1-3).

The false teachers are characterized by several traits:

• They deny Christ's lordship (2:1)
• They are sexually immoral and teach others to be (2:2, 14, 18)
• They are motivated by greed (2:3, 14)
• They despise authority (2:10)
• They are arrogant and slanderous (2:10-12)
• They promise freedom but are themselves slaves to depravity (2:19)

Peter uses three Old Testament examples to assure readers that God knows how to judge the ungodly: the fallen angels (2:4), the flood (2:5), and Sodom and Gomorrah (2:6). But he balances these with examples of rescue: Noah was saved from the flood, Lot was rescued from Sodom. 'The Lord knows how to rescue the godly from trials and to hold the unrighteous for punishment on the day of judgment' (2:9).

The most sobering statement: 'It would have been better for them not to have known the way of righteousness, than to have known it and then to turn their backs on the sacred command that was passed on to them' (2:21). Knowledge increases responsibility. Apostasy after knowledge is worse than ignorance.

Chapter 3: The Day of the Lord

The final chapter addresses the false teachers' most seductive argument: 'Where is this "coming" he promised? Ever since our ancestors died, everything goes on as it has since the beginning of creation' (3:4). This is uniformitarianism applied to eschatology — the belief that because things have always been this way, they always will be.

Peter's response unfolds in three movements:

1. History refutes uniformitarianism (3:5-7): The scoffers 'deliberately forget' that God has already intervened catastrophically — through the flood. The same God who judged by water will judge by fire. The present world is 'reserved for fire, being kept for the day of judgment and destruction of the ungodly.'

2. God's timeline is not ours (3:8-9): 'With the Lord a day is like a thousand years, and a thousand years are like a day. The Lord is not slow in keeping his promise, as some understand slowness. Instead he is patient with you, not wanting anyone to perish, but everyone to come to repentance.' The delay is not evidence of abandonment but of mercy. Every day the Lord delays is another day for repentance.

3. The Day will come (3:10-13): 'The day of the Lord will come like a thief. The heavens will disappear with a roar; the elements will be destroyed by fire, and the earth and everything done in it will be laid bare.' The certainty of this day leads to a practical question: 'Since everything will be destroyed in this way, what kind of people ought you to be? You ought to live holy and godly lives' (3:11). Eschatology produces ethics. Belief in Christ's return should change how we live now.

Peter then looks beyond destruction to renewal: 'We are looking forward to a new heaven and a new earth, where righteousness dwells' (3:13). The fire is not the end of the story — it is the purification that makes way for God's new creation.

The letter closes with a remarkable reference to Paul: 'Our dear brother Paul also wrote you with the wisdom that God gave him. He writes the same way in all his letters... His letters contain some things that are hard to understand, which ignorant and unstable people distort, as they do the other Scriptures, to their own destruction' (3:15-16). Two things stand out: Peter calls Paul's letters 'Scriptures' — placing them alongside the Old Testament — and he admits that some of Paul's writing is 'hard to understand.' Peter and Paul were not rivals but co-laborers, and Peter endorses Paul's authority even while acknowledging his difficulty.

Why it matters

2 Peter addresses a temptation that is just as powerful today as it was in the first century: the temptation to conclude that because Christ has not returned, He is not going to. Every generation faces scoffers who say 'Where is the promise of His coming?' Peter's answer is permanent: the delay is patience, the promise is certain, and the day will come. In the meantime, grow in grace and knowledge, guard against false teaching, and live as people who expect a new heaven and a new earth where righteousness dwells.