Yes. If we want to study Bhagavad-gītā, then we follow the principles. Just like we have explained this in the introduction, that when you take a bottle of medicine, there is some direction that "Two tablets, twice in a day after meals." So you have to follow the instruction. Then you get benefit. You cannot take any instruction about taking that medicine from a friend or from an expert educationist. No. You have to take direction only from the physician. He is the expert in that line.
Similarly, here is the direction, the bottle of Bhagavad-gītā. Kṛṣṇa says, "It should be understood by the devotee, or you have to understand Bhagavad-gītā from a devotee." This is the direction of this medicinal bottle. How you can go otherwise? Then you will get the benefit. That is explained.