The Scofield Bible Commentary, by Cyrus Ingerson Scofield, [1917], at sacred-texts.com
Book Introduction - Song of Solomon
Nowhere in Scripture does the unspiritual mind tread upon ground so mysterious and incomprehensible as in this book, while the saintliest men and women of the ages have found it a source of pure and exquisite delight. That the love of the divine Bridegroom should follow all the analogies of the marriage relation seems evil only to minds so ascetic that martial desire itself seems to them unholy.
The interpretation is twofold: Primarily, the book is the expression of pure marital love as ordained of God in creation, and the vindication of that love as against both asceticism and lust--the two profanations of the holiness of marriage. The secondary and larger interpretation is of Christ, the Son and His heavenly bride, the Church (Co2 11:1-4 refs).
In this sense the book has six divisions:
1. The bride seen in restful communion with the Bridegroom (Song of Songs 1:1 - 2:7).
2. A lapse and restoration (Song of Songs 2:3 - 3:5).
3. Joy of fellowship (Song of Songs 3:6 - 5:1).
4. Separation of interest--the bride satisfied, the Bridegroom toiling for others (Song of Songs 5:2-5).
5. The bride seeking and witnessing (Song of Songs 5:6 - 6:3).
6. Unbroken communion (Song of Songs 6:4 - 8:14).