Holy calling = holy brethren

The context of 2 Timothy 1:9 is in reference to a saved person's vocational call.

Who hath saved us, and called us with an holy calling, not according to our works, but according to his own purpose and grace, which was given us in Christ Jesus before the world began,

This means that our life's purpose as Christians is to live a holy life.

The Old Testament proclaims: "for he is an holy God".

The New Testament proclaims:  "Wherefore the law is holy, and the commandment holy, and just, and good".

Christians are saved by a holy God, who has a holy law, with holy commandments, and his purpose for saved people is that they live out their holy calling!

This vocational calling of holiness should be manifest in every believers' life.

This includes the music we listen to, the way we dress, the words we use and the thoughts we think.

If someone's truly been saved, they should be fulfilling their holy calling of living a holy life, with a heavenly perspective.

Hebrews 3:1 Wherefore, holy brethren, partakers of the heavenly calling, consider the Apostle and High Priest of our profession, Christ Jesus;