The book called the Song of Solomon is called the "Song of
songs" (v.1). Its theme is love - which, when properly
understood, is the greatest of all themes (1 Corinthians 13:13).
Many people do not understand the Song of Solomon because
they forget it is one of God's books. It illustrates
God's love for His people whom He describes elsewhere as his
"Bride" (see, for example, Isaiah 54:5,6).
The story is woven around the Shulamite and the shepherd;
but also involves groups of women, watchmen and other characters.
The love of the bridegroom for his bride, and her response,
is beautifully portrayed, pointing forward to the love of
Christ for his true followers, and their devotion to him.
The intimate relationship, which will exist between them,
is likened in the song to that between a dove and its mate,
which is a lifelong partnership (2:14).
Faithful followers of Christ (his 'Bride') will be made both
sinless and immortal at the return of the Bridegroom (i.e.
the return of Christ).
Thus the words of 4:7 will be made true; "you are all fair,
my love; there is no flaw in you". The "marriage of the Lamb"
to his Bride can take place, as foretold in Revelation 19:6-8.
This means they will be united, both in immortality and in
outlook, with Christ and also with God Himself (see John 17:21).
Together, the Bridegroom and the Bride will inherit the Promised
Land: this will extend over the whole Earth. Paradise will
be restored and all creation will rejoice.