Romans 14:19

So then let us follow after things which make for peace, and things whereby we may edify one another.

The admonition of these words demands that a true Christian follow a constructive program of doing the things that produce harmony, induce fellowship, and lead to fuller appreciation and love among the brethren. Again from Murray,

The practical rule applied here is that when anything is morally indifferent to me, before I act on the conviction, I must ask how such action will affect the peace of the church, and the Christian growth of others.[16]

Instead of channeling all his activities along the lines of what is personally pleasing to himself, the genuine Christian must so order his behavior as to make it a constructive and positive force of building love and harmony within the sacred body of the church, consciously directing all of his words and deeds to that end.

Edify one another ... The root from which this word comes has reference to construction, as in the erection of a building, being related to the word "edifice," and thus conveying the thought of building up the church, instead of tearing it down. There are almost unlimited areas of thought and discussion which are absolutely without profit and can lead only to doubts, questionings, and loss of faith. These shall be avoided at all cost. Paul here prescribed, as a substitute for such negative activities, the positive and constructive type of behavior which is consciously directed to building up and strengthening one's fellow Christians. This is a far different thing from merely refraining from what would do them harm. Every man should ask himself, "What am I doing to build up the church?"