This document discusses how the gospel has the power to change people's lives in three ways: 1) By providing forgiveness of sins through Jesus, it can change their past. 2) By offering comfort, it can change their present life. 3) By providing eternal life, it can change their future after death. It encourages evangelizing others with the gospel message to change lives "one soul at a time" and allow the gospel to change one's own life as well.