The Comforter—the Holy Spirit

Now there comes a difficulty. The bad tenant is a very strong old man; the new tenant is a weak young man. Though he has full authority, he has no power to carry out the landlord's wishes. He appeals for help and the landlord sends a strong friend from his own house to help him to overcome the old tenant, and to keep him in custody.
This strong friend is the Holy Spirit, "strengthened with might by His Spirit in the inner man" Eph. 3:16. So we often read of His overcoming the old tenant, rather than of the new tenant's doing so. We must, of course, understand that this friend never interferes unless the new tenant wishes it. See Gal. 5:17, 25, etc.