Srimad Bhagavadgita Sadhaka Sanjivani -Swami Ramsukhdas
Having revealed to Arjuna His cosmic form, the Lord in the fifty-fourth and the fifty-fifth verses of the eleventh chapter, explained the merits of exclusive devotion, and the traits of such a devotee. So, in the first verse of the twelfth chapter, Arjuna inquired "Who are considered to be superior, those who are properly engaged in Your devotional service, or those who worship the Imperishable and the Unmanifested?" Therefore, the Lord, in the twelfth chapter, described the devotees, who are properly engaged in His devotional service, and described the attributeless, supreme Brahma, in the thirteenth chapter and upto the twentieth verse of the fourteenth chapter. In the twenty-first verse of the fourteenth chapter, Arjuna asked, "What are the marks of him, who has risen above the three gunas (modes)? What is his conduct like? How does he transcend the three modes?" In response to his questions, the Lord explained about exclusive devotion, the means to rise above the three modes i.e., - He gave a hint of divine nature, through exclusive devotion and of demoniac nature, through adulterated devotion. He started the fifteenth chapter, in order to explain how to develop that exclusive devotion.