In the third chapter, it is said with reasons that, with reference to an aspirant in whom the bodily impulses are strong, he should practise Karma Yoga alone. He is not qualified for Jñana Yoga all at once; and even if he is qualified for Jñana Yoga, the practice of Karma Yoga alone, preceded by comtemplation on the self as not an agent of any action, is better. It has also been shown that in respect of a person who is distinguished for his virtues (and is expected to set an example for others), Karma Yoga alone must be practised by him. Now in the fourth chapter the need for practising Karma Yoga is confirmed, as it was taught at the very beginning of the age of Manu for the deliverance of all beings. As it includes knowledge of the self, it is shown that such Karma Yoga includes Jñana Yoga in its scope. Further, the nature of Karma Yoga with its divisions and the pre-eminence of the knowledge portion in it, is spoken of. Incidentally the truth about the incarnations of the Lord is also set forth.