Heidelberg Catechism 12.32

Chapter 12 — Lord's Day 12

Section 32. Q. 32: But why are you called a Christian? A. Because by faith I am a member of Christ and so I share in his anointing. I am anointed to confess his name, to present myself to him as a living sacrifice of thanks, to strive with a good conscience against sin and the devil in this life, and afterward to reign with Christ over all creation for all eternity.