In this weeks sermon I read you a couple of long quotes from John Chrysostom, because he uses such beautiful language to comment on this passage.  Here is an extended quote for your reading:

What is this unity of Spirit? In the human body there is a spirit which holds all together, though in different members. So is it also here; for to this end was the Spirit given, that He might unite those who are separated by race and by different manners; for old and young, rich and poor, child and youth, woman and man, and every soul become in a manner one, and more entirely so than if there were one body. For this spiritual relation is far higher than the other natural one, and the perfectness of the union more entire; because the conjunction of the soul is more perfect, inasmuch as it is both simple and uniform. And how then is this unity preserved? In the bond of peace.

He would have us tied one to another; not simply that we be at peace, not simply that we love one another, but that all should be only even one soul. A glorious bond is this; with this bond let us bind ourselves together with one another and unto God.

This is a bond that bruises not, nor cramps the hands it binds, but it leaves them free, and gives them ample play, and greater courage than those which are at liberty. The strong if he be bound to the weak, will support him, and not suffer him to perish: and if again he be tied to the indolent, him he will rather rouse and animate. Brother helped by brother, it is said, is as a strong city. This chain no distance of place can interrupt, neither heaven, nor earth, nor death, nor any thing else, but it is more powerful and strong than all things.

The love of God is that which united earth to Heaven. It was the love of God that seated man upon the kingly throne. It was the love of God that manifested God upon earth. It was the love of God that made the Lord a servant. It was the love of God that caused the Beloved to be delivered up for His enemies, the Son for them that hated Him, the Lord for His servants, God for men, the free for slaves. Nor did it stop here, but called us to yet greater things. Yes, not only did it release us from our former evils, but promised, moreover, to bestow upon us other much greater blessings. For these things then let us give thanks to God, and follow after every virtue; and before all things, let us with all strictness practice love, that we may be counted worthy to attain the promised blessings; through the grace and loving-kindness of our Lord Jesus Christ, with whom, to the Father together with the Holy Ghost, be glory, might, and honor, now and for ever and ever. Amen