2 Corinthians 6

But it is not only that from which we are separated to be in this position of sons and daughters that engages the apostle's attention, but the legitimate consequences of such promises. Sons and daughters of the Lord God Almighty, holiness becomes us. It is not only that we are to be separate from the world; but, in relationship with God, to cleanse ourselves from all filthiness of the flesh and spirit: holiness in the outward walk, and that which is quite as important with regard to our relationship to God, purity of thought. For, although man does not see the thoughts, the flow of the Spirit is stopped in the heart. There is not enlargement of heart in communion with God, It is much if His presence is felt, His relationship to us realised; grace is known, but God scarcely at all, in the way in which He makes Himself gradually known in communion.

8: What a blessed state is that of a man, who, when he is taken out of himself and a state of calm reflection, is entirely absorbed with, or turned towards, God, and, when he does think soberly and calculates, is occupied in love in seeking the good of his brethren, the members of Christ: who is either rapt up into the contemplation of God and communion with Him, or filled with Him, so as to think only of others in love!

9: The reader may remark that the passage sets two things before us: that God is present in the assembly of those who are separated from the world, and walks among them, as He did in the case of Israel in the wilderness when they had come out of Egypt; and that the individuals who compose the assembly enter into the relationship of sons and daughters.