forgiveness grace jesus jesus' return angels jesus' second coming second advent purpose mission end times self-worth gospel revelation righteous punishment harvest everlasting gospel son of man worship god redeemed 2020 sabbath school ss identity lesson 12 making friends for god quarter 3 daily daily reading tuesday last-day message a message worth sharing september 15 babylon is fallen worshiping the beast fear god first angel give glory to god christ's return cleansed from sin destruction of the wicked earth's final harvest final judgment good seed harvest of grain harvest of grapes harvest of overripe grapes harvest of ripe grain injustice ended last days of human history last warning light-bearers power to overcome sin reapers redemption of the righteous revelation’s end-time message second angel symbolism tares third angel three angels' message watchmen wicked