All of us practice this principle everytime we come together for worship. We must understand that a man's conscience is a very personal thing and when that conscience becomes involved in his relationship with his God, minor points become important to him, in fact, so important that his salvation depends upon his obeying his conscience. No two men ever agreed upon every verse of scripture unless one was a rubber stamp. God's children are not only allowed to disagree but they must differ if there is to be growth. This is one thing that gives us the exercise we need in order to develop.
Children have to scuffle in order to grow up normally.
Each individual must develop his own conscience, and allowances must be made for different personalities. In the final analysis there are situations which may arise that can only be solved by a separation. But separation per se is not sinful. Some have said that when two disagree, both may be wrong, but both cannot be right. Someone has to be wrong if there is a disagreement.