CHAPTER XXV: QUESTION 23: THE ADOPTION OF CHRIST


PROLOGUE

The purpose of this question is to refute the heresy of the Adoptionists who, following in the wake of Nestorianism, said in the eighth century that Christ as man is the adoptive son of God.

The Church has defined that the man Christ is the only and natural Son of God,[1579] and nowise the adoptive son.[1580] The Church also declared that it is only allegorically on account of Christ's obedience to His Father that He is called a servant.[1581] He is not the Son of the Holy Spirit,[1582] but truly the Son of the Virgin Mary.[1583] In fact, He has two births, His eternal birth as God, and His temporal birth as man,[1584] but not two sonships, neither adoptive sonship as regards God the Father, nor a real relation of sonship as regards the Blessed Virgin Mary.

The principal definitions of the Church against the errors of the Adoptionists are to be found in the Enchiridion.[1585] The assertion that Christ as man is the adoptive son of the Father is rejected as heretical in both the Council of Frankfort and the Council of Frejus.[1586] This assertion was again condemned in the Second Council of Lyons.[1587]

This error gives St. Thomas the opportunity to explain here more fully what is the nature of divine adoption than in the treatise on grace, although the fundamentals of the doctrine concerning divine adoption are explained in the treatise on grace.