Psalm 133— A Song of Ascents. Of David. 1 Behold, how good and how pleasant it is for brethren to dwell together in unity! 2 It is like the precious oil upon the head, running down on the beard, the beard of Aaron, running down on the edge of his garments. 3 It is like the dew of Hermon, descending upon the mountains of Zion; for there Yahweh commanded the blessing— life forevermore.
One voice- "It is a pleasant thing for the saints and people of God to agree together; for the same word which is used here for 'pleasant,' is used also in the Hebrew for a harmony of music, such as when they rise to the highest strains of the viol, when the strings are all put in order to make up a harmony; so pleasant is it, such pleasantness is there in the saints' agreement.” (William Bridge) “Whether we dwell north or south, meeting in Zion, and sharing in the blessings of that eternal Priesthood of Christ, we form in reality, and before our Father, but one family—‘the whole family in earth and heaven.’ Our real bond of union consists in the ‘flowing down’, the ‘running down’, or ‘descending’ of the common blessing, which marks the steps in this Psalm of Degrees ... And if ‘the dew of Hermon’ has descended upon ‘the mountains of Zion’ long after the sun has risen shall gladsome fruit appear [in the lad—in some twenty, in some thirty, and in some a hundred fold.” (Alfred Edersheim)
“‘Behold, how good and how pleasant it is for brethren to dwell together in UNITY!’ But it can never be "sans doctrine." The ark must be in Zion for biblical unity. “David brings to the consciousness of the church the glory of the fellowship of the saints, that had so long been wanting, the restoration of which had begun with the setting up of the Ark in Zion.” (Ernst Wilhelm Theodor Herrmann Hengstenberg) "On the last day, that great day of the feast, Jesus stood and cried out, saying, 'If anyone thirsts, let him come to Me and drink. He who believes in Me, as the Scripture has said, out of his heart will flow rivers of living water.' But this He spoke concerning the Spirit, whom those believing in Him would receive; for the Holy Spirit was not yet given, because Jesus was not yet glorified.” (John 7:37-39) “In essentials of the faith unity, in doubtful (non-fundamental) things liberty, in all things charity."(Richard Baxter)
“‘It is like the precious oil upon the head, running down on the beard, the beard of Aaron, running down on the edge of his garments.’ Magnificence, misnamed by a man’s extravagance and waste, is the invariable attribute of all true love. David recognized this truth when he selected the profuse anointing of Aaron with the oil of consecration at his installation into the office of High Priest as a fit emblem of brotherly love. There was waste in that anointing, too, as well as in the one which took place at Bethany. For the oil was not sprinkled on the head of Aaron, though that might have been sufficient for the purpose of a mere ceremony. The vessel was emptied on the High Priest's person, so that its contents flowed down from the head upon the beard, and even to the skirts of the sacerdotal robes. In that very waste lay the point of the resemblance for David. It was a feature that was very likely to strike his mind; for he, too, was a wasteful man in his way. He had loved God in a manner which exposed him to the charge of extravagance. He had danced before the Lord, for example, when the ark was brought up from the house of Obed-edom to Jerusalem, forgetful of his dignity, exceeding the bounds of decorum, and, as it might seem, without excuse, as a much less hearty demonstration would have served the purpose of a religious solemnity.” (Alexander Balmain Bruce) “’That ran down...that went down,’ etc. Christ's grace is so diffusive of itself, that it conveys holiness to us, ‘running down from the head to the skirts,’ to all his members. He was not only anointed Himself, but He is our anointer.” (Thomas Adams)
“Hence he is called par excellence ‘the anointed priest’…, whilst the other priests are only ‘anointed’ (…Num 3:3) in so far as their garments, like Aaron's, were also sprinkled with the oil (together with the blood of the ram of consecration), Lev 8:12, Lev 8:30... Two drops of the holy oil of anointing, says a Haggada, remained forever hanging on the beard of Aaron like two pearls, as an emblem of atonement and of peace.” (Keil and Delitzsch) “Now the main point of what we are saying is this: We do have such a High Priest, who sat down at the right hand of the throne of the Majesty in heaven, and who serves in the sanctuary, the true tabernacle set up by the Lord, not by a mere human being. Every high priest is appointed to offer both gifts and sacrifices, and so it was necessary for this one also to have something to offer. If He were on earth, He would not be a priest, for there are already priests who offer the gifts prescribed by the law. They serve at a sanctuary that is a copy and shadow of what is in heaven. This is why Moses was warned when he was about to build the tabernacle: ‘See to it that you make everything according to the pattern shown you on the mountain.’ [Exod25:40] But in fact the ministry Jesus has received is as superior to theirs as the covenant of which He is mediator is superior to the old one, since the new covenant is established on better promises.” (Hebrews 8:1-6)
“It is like the dew of Hermon, descending upon the mountains of Zion.’ As touching this similitude, I think the prophet useth the common manner of speaking. For whereas the mountains oftentimes seem to those that behold them afar off, to reach up even unto heaven, the dew which cometh from heaven seemeth to fall from the high mountains unto the hills which are under them. Therefore he saith that the dew descendeth from Hermon unto the mount Sion, because it so seemeth unto those that do behold it afar off.” (Martin Luther) “The dews of the mists that rose from the watery ravines, or of the clouds that rested on the summit of Hermon, were perpetual witnesses of freshness and coolness—the sources, as it seemed, of all the moisture, which was to the land of Palestine what the fragrant oil was to the garments of the High Priest.” (Arthur Penrhyn Stanley) "The blessing there, that is, in Zion, the Church;—blessed with enriching dews, suggests this allusion the source of the influence enjoyed by the spiritual Zion.” (Jamieson-Fausset-Brown)
“For there [at Zion] Yahweh commanded the blessing— life forevermore.’ By a bare word of command He blesseth: ‘there He commands the blessing,’ that blessing of blessings, ‘even life for evermore;’ like as it is said, ‘He commanded, and they were created:’ Psalm 148:5. “ (Thomas Goodwin) “As for you, see that what you have heard from the beginning remains in you. If it does, you also will remain in the Son and in the Father. And this is what he promised us—eternal life.” (1 John 3:24-25)