My church uses the 1921 Garden City confession, which has an article titled "Of Separation."Modern Christians hope to save the world by being like it, but it will never work. The Church’s power over the world springs out of her unlikeness to it, never from her integration into it.
-A. W. Tozer
Additionally, the concept of separation from the world comes up in our rules of discipline, in the section on dress and maybe elsewhere.Article X - OF SEPARATION
We believe that we are called with a holy calling to a life of separation from the world and its follies, sinful practices, and methods; further that it is the duty of the Church to keep herself aloof from all movements which seek the reformation of society independent of the merits of the death of Christ and the experiences of the new birth. I Pet. 2:9; Tit. 2:11-14;2:15; Mt. 28:19, 20; 18:15-18; Eph. 4:11-16; Heb. 13:17; Acts 14:21-23; 1:15-26.
I'm curious what your thoughts are on the topic. In your church, how prominently does this idea feature in your church literature, teaching, practical applications, and real-life discussions?