What does 2 Peter 3:4 mean?
In the previous verse, Peter warned that false teachers among the Christians would be "scoffers" or "mockers." Here in verse 4, we see what they are mocking: the return of Christ. According to the Bible, Jesus will return in glory to be revealed to all as Lord and to judge the people of the world (John 14:1–3). False teachers dispute this claim.The essence of this deceptive mocking is the claim that we know better than God. At least, we know when things should occur better than God does. The false teachers seem to be saying, "Jesus promised He would come back, but that was too long ago. The world just keeps going on and on in the same way it always has. So Jesus must not be coming back." As a result, these deceivers convince others that God's other promises are not true. If there is no return of Christ, their argument goes, there must not be a judgment coming for sin. So God must not really care about our sin. So it's acceptable to be "free" and do whatever you feel like doing. This, of course, is both false and dangerous thinking.
The false teachers point back to the deaths—the "falling asleep"—of the Jewish fathers or ancestors. In other words, the men who made the prophecies about the return of Christ were long dead. When Peter wrote these words, even some of the apostles who had predicted the return of Jesus were already passed away. In our modern day, of course, these predictions are even older, and the men who made them even longer dead. Yet the world keeps ticking along in the way it always has.
For all of recorded history, the false teachers argue, the physical world has been operating in a normal, predictable, uniform way. In some disciplines, this perspective is sometimes called "uniformitarianism." Spiritual events may have taken place, but the "real world" never varies. This can lead to a wrong conclusion about spiritual matters: that God will not intervene in the physical world. That God always lets it go along its natural course.
Peter will dismantle this view in the next few verses.