Meaning of 2nd half of song --- Reign of love
Here's what I think of the lyrics:
Reign of love
I can’t let go
To the sea I offer
This heavy load
The person who's saying this can't let go of his past love and so to the sea of time, he offers his heavy load of grief (since he really doesn't know how to deal with his lost love)
Locusts will
Lift me up
I’m just a prisoner
In a reign of love
Locusts, in a figurative sense, were considered to be representative of god's wrath/punishment; in reality, they can ravage entire fields of crops, but interestingly, clouds of locusts can be selective and often, fields beside the ravaged fields are left completely untouched. I think the person in this song feels he's being punished and feels somewhat alone in his grief.
Locusts will
Let us stop
I wish I’d spoken
To the reign of love
This loneliness and grief over his past love might stop if he says something.
Reign of love
By the church, we’re waiting
Reign of love
My knees I go praying
The church is the traditional place to get married, so there the singer is waiting, while he prays.
How I wish I'd spoken up
Or we'd been carried
To the Reign of love
The singer wishes he had spoken up because if he had, he and his love would be together right now.