Christ is the "surety"; the word signifies one that draws nigh: Christ drew nigh to his Father in the council of peace, and undertook to be the Saviour and Redeemer of his people he substituted himself in their place and stead; he interposed between the creditor and the debtor, and became surety for the payment of the debts of the latter, and so stood engaged for them, and in their room: Christ is not the surety for the Father to his people, but for them to the Father; as to satisfy for their sins, to work out a righteousness for them, to preserve and keep them, and make them happy; which is an instance of matchless love.
—John Gill