This intercession consists of various acts.

(1) The appearing of Christ for us by which he places himself before God the father as the only satisfier for our sins, representing the blood once shall (i.e., The merit of his death) and asking that at the side of it he would pardon our sins and bestow upon us all blessings necessary to salvation, until he has conducted us into the possession of full felicity: “Father, I will that they also whom thou hast given me, be with me where I am; that they may behold my glory” (Jn. 17:24). Hence the lamb is seen standing in heaven, as if it had been slain (hos esphagmenos, Rev. 5:6) because his blood is ever fresh and living (i.e., of eternal virtue and efficacy).

(2) Our defense and protection against the thunderbolts of the law and the accusations of Satan, pleading our cause at the tribunal of God.

(3) His suretyship for us by which as he demands grace from the Father and the gifts of the Spirit necessary to our perseverance, so in turn in our name he promises to God obedience and fidelity.

(4) The offering of our persons and the sanctification of our prayers and of our entire worship, inasmuch as he presents all our prayers to God as spiritual sacrifices, perfumed with the most fragrant odor of his own sacrifice, so that in and through him they may be pleasing and acceptable to God. (1 Pet. 2:5). Hence he is represented as an angel with a burning censer (Rev 8:3) to whom is given much incense, that he should offer it with the prayers of saints. Elsewhere he is called an altar upon which all our sacrifices must be placed and on which alone the rational worship we render to God can be pleasing to him.

— Francis Turretin, Institutes of Elenctic Theology, 14.15.14