Q: What offices doth Christ execute as our Redeemer?
A: Christ, as our Redeemer, executeth the offices of a prophet, of a priest, and of a king, both in his estate of humiliation and exaltation.

Q: How doth Christ execute the office of a prophet?
A: Christ executeth the office of a prophet, in revealing to us, by his word and Spirit, the will of God for our salvation.

Q: How doth Christ execute the office of a priest?
A: Christ executeth the office of a priest, in his once offering up of himself a sacrifice to satisfy divine justice, and reconcile us to God; and in making continual intercession for us.

(Questions XXIII, XXIV and XXV from the Westminster Shorter Catechism)