It's a message from God to the prophet Jeremiah telling God's people to bloom where we are planted (wherever that may be), and to help others bloom too!
Isaiah speaks the words of YHWH, telling God's people it's time to stop with the meaningless gestures, and start with the doing the work of Christ in the world.
The prophets of old spoke God's message; they also lived God's message. Hosea's personal familial relationships became a metaphor for God's relationship with God's people.