This Book is called the Canticle of Canticles, that is to say, the most
excellent of all canticles: because it is full of high mysteries,
relating to the happy union of Christ and his spouse: which is here
begun by love; and is to be eternal in heaven. The spouse of Christ is
the church: more especially as to the happiest part of it, viz., perfect
souls, every one of which is his beloved, but, above all others, the
immaculate and ever blessed virgin mother.