Seven Bowls

Revelation 15:1-8
Great and marvelous sign: seven angels with the seven last plagues —last, because with them God’s wrath is completed.
Seven golden bowls filled with God's wrath were given to seven angels.
Now comes seven more angels with seven plagues. In5:8 John pictured golden bowls filled with the incense of prayer.
Seven bowls bring disaster to the earth, but first we see the joy and security of God's people.
There are not subjected to the final terrors, which are specially directed against evil.
Heaven is full of joyous song. Praising God, at last, coming naturally.
Why?