But why are you called a Christian?

Heidelberg Catechism

Question 32. But why are you called a Christian?

Answer. Because by faith I am a member of Christ[1] and thus a partaker of His anointing,[2] in order that I also may confess His Name,[3] may present myself a living sacrifice of thankfulness to Him,[4] and with a free conscience may fight against sin and the devil in this life,[5] and hereafter in eternity reign with Him over all creatures.[6]

[1] Acts 11:26; 1 Cor 12:12-27; 1 Jn 2:20, 27;
[2] Joel 2:28 [Acts 2:17]; 1 Jn 2:27;
[3] Mk 8:38, 10:32; Rom 10:9-10; Heb 13:15;
[4] Rom 12:1; 1 Pt 2:5, 9; Rev 1:6, 5:8, 10;
[5] Gal 5:16-17; Eph 6:11; 1 Tim 1:18-19;
[6] Mt 25:34; Eph 6:12; 2 Tim 2:12; Rev 3:21