“But how can we be sure that this message is the true Word of God?” Peter answers this question by referring to his experience with Christ on the Mount of Transfiguration (Matt.17:1–13; Luke 9:27–36). Peter knew that he would not be in the body (his tabernacle) very long; see John 21:18. The word “decease” (v. 15) is actually “exodus”; it is the same word used of Christ’s death (Luke 9:31). When Christians die, it is not the end; rather, it is a triumphant exodus from this world into the next.
Wiersbe, Warren W. Wiersbe’s Expository Outlines on the New Testament. Wheaton, IL: Victor Books, 1992. Print.