In one of Max Lucado’s books he asks a very interesting question. He says “couldn’t God have thought of something better to compare us to instead of sheep? Probably not.
Elijah, Sheep, Voice, God's Voice, Listening To God, Connections
We can only be grafted to Christ by cutting our attachment to our way of life and its creature comforts just like a gardener prunes bushes to make then grow better. The useless branches have to be removed in order to save and strengthen the stronger ones.
Vine And Branches, Being Connected, Productive Life, Connections