The "Devi Gita" is believed to have its roots in a change in theism that occurs around the 6th century toward seeing the Supreme Being, or God, as more of a female figure. This followed the rise to prominence of several male deities. Initially, the interest in God as a female figure saw her portrayed as the fierce, violent and bloodthirsty Great Goddess, or Mahadevi; but, later, she became a gentler, world-mother figure. Thus, the Goddess, or Supreme Female, appears in the "Devi Gita."
In the "Devi Gita," the divine female is portrayed as powerful yet compassionate, benign and beautiful. She is seen, in much the same way as the God of the Bhagavad Gita, as the universal cosmic energy or consciousness that resides in each being.
The "Devi Gita" is a non-dual text, and all dualities are presented as incorrect or illusions. Instead, the liberating knowledge to be gleaned is the interconnectedness of all beings with Brahman as the universal Soul.
The "Devi Gita" also discusses Bhakti yoga, or devotion, and describes para bhakti as the highest level of devotion to the Goddess where the devotee worships for worship's sake, not for personal gain.