Why is He called Christ, that is, Anointed?
Because He is appointed by God the Father and anointed with the Holy Spirit to be our chief Prophet and Teacher, who has fully revealed to us the secret counsel and will of God concerning our redemption; and to be our only High Priest, who by the one sacrifice of His body has redeemed us and makes continual intercession with the Father for us; and also to be our eternal King, who governs us by His Word and Spirit, and who defends and preserves us in that salvation He has purchased for us.
But why are you called a Christian?
Because I am a member of Christ by faith and thus share in His anointing, that so I may confess His name, and present myself a living sacrifice of thankfulness to Him; and also that with a free and good conscience I may fight against sin and Satan in this life, and afterwards reign with Him eternally over all creatures.