“A Song of degrees of David. Behold, how good and how pleasant it is for brethren to dwell together in unity! It is like the precious ointment upon the head, that ran down upon the beard, even Aaron’s beard: that went down to the skirts of his garments; as the dew of Hermon, and as the dew that descended upon the mountains of Zion: for there the LORD commanded the blessing, even life for evermore.” Psalm 133:1-3
The following is from The Treasury of David by Charles H. Spurgeon on verse one…
“”Behold.” It is a wonder seldom seen, therefore behold it! It may be seen, for it is the characteristic of real saints, – therefore fail not to inspect it! It is well worthy of admiration; pause and gaze upon it! It will charm you into imitation, therefore note it well! God looks on with approval, therefore consider it with attention. “How good and how pleasant it is for brethren to dwell together in unity!” No one can tell the exceeding excellence of such a condition; and so the Psalmist uses the word “how” twice; – Behold how good! and how pleasant! He does not attempt to measure either the good or the pleasure, but invites us to behold for ourselves. The combination of the two adjectives “good” and “pleasant,” is more remarkable than the conjunction of two stars of the first magnitude: for a thing to be “good” is good, but for it also to be pleasant is better. All men love pleasant things, and yet it frequently happens that the pleasure is evil; but here the condition is as good as it is pleasant, as pleasant as it is good, for the same “how” is set before each qualifying word.
For brethren according to the flesh to dwell together is not always wise; for experience teaches that they are better a little apart, and it is shameful for them to dwell together in disunion. They had much better part in peace like Abraham and Lot, than dwell together in envy like Joseph’s brothers. When brethren can and do dwell together in unity, then is their communion worthy to be gazed upon and sung of in holy psalmody. Such sights ought often to be seen among those who are near of kin, for they are brethren, and therefore should be united in heart and aim; they dwell together, and it is for their mutual comfort that there should be no strife; and yet how many families are rent by fierce feuds, and exhibit a spectacle which is neither good nor pleasant!
As to brethren inspirit, they ought to dwell together in church fellowship, and in that fellowship one essential matter is unity. We can dispense with uniformity if we possess unity: oneness of life, truth, and way; oneness in Christ Jesus; oneness of object and spirit – these we must have, or our assemblies will be synagogues of contention rather than churches of Christ. The closer the unity the better; for the more of the good and the pleasant there will be. Since we are imperfect beings, somewhat of the evil and the unpleasant is sure to intrude; but this will readily be neutralized and easily ejected by the true love of the saints, if it really exists. Christian unity is good in itself, good for ourselves, good for the brethren, good for our converts, good for the outside world; and for certain it is pleasant: for a loving heart must have pleasure and give pleasure in associating with others of like nature. A church united for years in earnest service of the Lord is a well of goodness and joy to all those who dwell round about it.” TREASURY OF DAVID
The blessing of unity begins with being in agreement with God through His Son Jesus Christ, and His death on the cross, His burial, and resurrection.