The Bible says that we are pilgrims and strangers on this earth, therefore, we should not live as if we belong here, because one day we will fly with Christ to the heavenly city, and this is the beautiful promise we have, that one day all pain and illness will end, because we will fly, oh glory! To the city of God, hallelujah!
The song “I’ll Fly Away” talks exactly about this. Part of its lyrics say: “When I pass from this darkness “I will fly like a bird set free, I will fly. How happy it will be to see us there, I will fly. No more death, pain or illness, I will fly.”