1. Exposition

Why will people wail when they observe Jesus’ coming?

Revelation 1:7 (ESV)

7 Behold, he is coming with the clouds, and every eye will see him, even those who pierced him, and all tribes of the earth will wail on account of him. Even so. Amen.

Jesus comes as judge (John 5:22). Those who have rejected him will rightly be greatly afraid of him who can destroy both soul and body in hell (Matthew 10:28).