Q. 36. Who is the Mediator of the covenant of grace?
A. The only Mediator of the covenant of grace is the Lord Jesus Christ,137 who, being the eternal Son of God, of one substance and equal with the Father,138 in the fulness of time became man,139 and so was and continues to be God and man, in two entire distinct natures, and one person, forever.140
Q. 37. How did Christ, being the Son of God, become man?
A. Christ the Son of God became man, by taking to himself a true body, and a reasonable soul,141 being conceived by the power of the Holy Ghost in the womb of the virgin Mary, of her substance, and born of her,142 yet without sin.143
Q. 38. Why was it requisite that the Mediator should be God?
A. It was requisite that the Mediator should be God, that he might sustain and keep the human nature from sinking under the infinite wrath of God, and the power of death,144 give worth and efficacy to his sufferings, obedience, and intercession;145 and to satisfy God’s justice,146 procure his favour,147 purchase a peculiar people,148 give his Spirit to them,149 conquer all their enemies,150 and bring them to everlasting salvation.151
Q. 39. Why was it requisite that the Mediator should be man?
A. It was requisite that the Mediator should be man, that he might advance our nature,152 perform obedience to the law,153 suffer and make intercession for us in our nature,154 have a fellow-feeling of our infirmities;155 that we might receive the adoption of sons,156 and have comfort and access with boldness unto the throne of grace.157
Q. 40. Why was it requisite that the Mediator should be God and man in one person?
A. It was requisite that the Mediator, who was to reconcile God and man, should himself be both God and man, and this in one person, that the proper works of each nature might be accepted of God for us,158 and relied on by us as the works of the whole person.159
Q. 41. Why was our Mediator called Jesus?
A. Our Mediator was called Jesus, because he saveth his people from their sins.160
Q. 42. Why was our Mediator called Christ?
A. Our Mediator was called Christ, because he was anointed with the Holy Ghost above measure,161 and so set apart, and fully furnished with all authority and ability,162 to execute the offices of prophet,163 priest,164 and king of his church,165 in the estate both of his humiliation and exaltation.
Q. 43. How doth Christ execute the office of a prophet?
A. Christ executeth the office of a prophet, in his revealing to the church,166 in all ages, by his Spirit and Word,167 in divers ways of administration,168 the whole will of God,169 in all things concerning their edification and salvation.170
Q. 44. How doth Christ execute the office of a priest?
A. Christ executeth the office of a priest, in his once offering himself a sacrifice without spot to God,171 to be reconciliation for the sins of his people;172 and in making continual intercession for them.173
Q. 45. How doth Christ execute the office of a king?
A. Christ executeth the office of a king, in calling out of the world a people to himself,174 and giving them officers,175 laws,176 and censures, by which he visibly governs them;177 in bestowing saving grace upon his elect,178 rewarding their obedience,179 and correcting them for their sins,180 preserving and supporting them under all their temptations and sufferings,181 restraining and overcoming all their enemies,182 and powerfully ordering all things for his own glory,183 and their good;184 and also in taking vengeance on the rest, who know not God, and obey not the gospel.185