Uru-dāmni baddhāḥ. Uru means very strong, and dāmni means rope. Just like if I tie you with very strong rope, it is very difficult to open it, and you are put into difficulty. Similarly, we are in this material world uru-dāmni baddhāḥ, tied very tight with the laws of material nature. And we are declaring still, "I am free. I am independent. I can do whatever I like." This is called imperfection. So long we are in the bodily concept of life and think ourself that we are free to do anything, whatever we like, we are in ignorance, darkness, tama. Tama means darkness.
So Vedic injunction is, tamasi mā jyotir gama. "Don't remain in darkness." This is darkness. Darkness means "I am this body, and the. . ., to fulfill the necessities of the body is the highest perfection of my life." Everyone is trying for that, competition. Everyone is trying to have a skyscraper building and three Rolls-Royce cars and so on, so on. They think that this is perfection of life, durāśayā, durāśayā ye bahir-artha-māninaḥ, this material energy's production. But you do not think that "How many years I shall enjoy this skyscraper building? And what is my main business? My main business is how to become perfect." There are many animals within the skyscraper building. There are human being, there are dogs, there are cats, there are worms, rats, so many things. So to live in the skyscraper building, that facility is there even to the worms, cats, rats, everyone. That. . . Then what is the difference between these animals and me? The difference is how to become perfect, siddhi, svarūpa-siddhi. "What I am? Am I this body?" This should be the question. Athāto brahma jijñāsā.
So Kṛṣṇa says here that "Ultimate goal is to understand Me," vetti māṁ tattvataḥ, to understand Kṛṣṇa in fact, in truth, not superficially. That is required. Vedaiś ca sarvair aham eva vedyaḥ (BG 15.15). If you are a great scholar studying all kinds of literature, Vedas, then you must know Kṛṣṇa. If you do not understand Kṛṣṇa and simply you study Vedas, it is useless waste of time.