"The Lord is not slow to fulfill his promise as some count slowness, but is patient toward you, not wishing that any should perish, but that all should reach repentance." 2 Peter 3:9

This verse is often taken out of context, misinterpreted, and misapplied. The key question is this: who does 'you', 'any' and 'all' refer to? Figure that out and you unlock the meaning. In context of 1 and 2 Peter, it refers to the elect (1 Peter 1:1), “those who have obtained a faith of equal standing with ours by the righteousness of our God and Savior Jesus Christ" (2 Peter 1:1). The immediate context states that the ungodly will be destroyed (2 Peter 3:7), so how could they come to repentance? This verse means that all the elect will come to repentance, that none of them will perish. The “whosoever believes” of John 3:16 means the elect. The elect will realize their need and turn to Jesus and be saved. It is ultimately because God willed it.