Separated from disobedient brethren and doctrinal compromise with respect to all ministry and service. A believer is identified with the doctrinal positions and practices of those he is in fellowship with, both before God and man. Separation from those who are not walking according to truth deters the leavening effect of compromise, and gives a faithful warning to the erring brother. Romans 16: 17; 2 Thessalonians 3:6,14-15; 2 John 10-11; Galatians 2:9-11; 1 Corinthians 15:33.