The RCA affirms the Chalcedonian definition: Jesus Christ is one divine person in two natures, truly God and truly man. The divine and human natures are united in the single person of the eternal Son of God without mixture, confusion, separation, or division.

The Son's divine nature was not diminished or suspended by the assumption of human nature. He remained fully God while becoming fully human. In his state of humiliation, he voluntarily subjected himself to human limitations (hunger, fatigue, temptation) while remaining sinless. In his state of exaltation, he was raised, ascended to heaven, and is seated at the right hand of the Father.

The Heidelberg Catechism teaches that Christ is true God and true man. His humanity is complete—he experienced genuine human development, learning, and emotion—yet his divine nature ensured his sinlessness and redemptive efficacy. This doctrine is foundational to understanding both his work as Savior and his person as Mediator.