From James Durham's commentary on the Song of Solomon:
She illustrates this description of her self, or her mixed condition, by two similitudes, both tending to one thing, or one of them tending to set forth her blacknesse, the other her beauty. I am (saith she) like the Tents of Kedar, which were blackish, and of no great value, being, by these who lived in them, so frequently transported in such hot countreys; this sets forth her blacknesse. The similitude is, that she was like the Curtains of Solomon: he built glorious dwellings, and being a rich King, no question had rich Hangings; this sets forth her beauty: as if she would say, ye must not judge of my worth from one side, especially my out∣side, or upon one consideration, for I have in me, both to humble and comfort me. It may be also, though these Tents of Kedar were not outwardly beautiful, yet they were within well furnished; and that the Curtains of Solomon which were most rich, had outer coverings of smaller value, as the Tabernacle had of Badgers skins; and so the similitudes illustrate her condition, and sets out the thing more to the life, as Kedar's Tents (saith she) look poor and base-like, yet if ye look within, they are glorious; so think not strange, if I appear without beauty to the eye, there may be, yea, there is comelinesse within, if ye could discern it, for within the Kings daughter is all glorious, Psal. 45. 13. which way of distinguishing, is a notable piece of spiritual wisdom and learning, and a great mean of peace in our selves; when what is true of our infirmities, is acknowledged, and yet the conclusion that tentation would infer, is denyed. Here observe, 1. The conditions of Believers, even the best of them are mixed of good and ill, sin and grace, comfortable priviledges and sad sufferings. 2. There is a mixture of blacknesse in Believers beauty, even in their best frame and condition, for she is now in the King's Chamber, and yet we find her saying, I am black. 3. Believers, if they would consider what they are rightly, they would look on themselves as having contraries in them. 4. Where challenges are just and well grounded, they should be acknowledged, and taken with. 5. It is wisdom so to acknowledge our sin, as we may difference it from any work of God's grace in us. 6. Believers their observing of their sinfulnesse, should not make them deny their grace; and their observing their grace, should not make them forget their sinfulnesse. 7. The crosse that follows godlinesse, or the stain and spot that is on a godly person, is sooner taken notice of by on-lookers, than either the advantages that follow holinesse, or the graces and spiritual beauty of holy persons; this makes it needfull to remove this offence. 8. When it may be edifying, Believers would assert the worth and beauty of holinesse, and their own comelinesse thereby, as well as confesse their own infirmities; and Christian communion will require both.