So Bhagavad-gītā is the perfect knowledge. We are now materially contaminated. So you can say, "What is the wrong? If you are materially contaminated, what is the wrong?" That is our lack of knowledge. We cannot understand what is the wrong. The wrong thing we take as pleasing. This is the disease. First of all we must know whether we are happy in this material world. But we have no intelligence. Mūḍha. We have been described as mūḍha. Just like there are three kinds of miserable condition always. This boy is fanning me. Why? There is little miserable condition here: we are feeling too hot. So again, if you go outside, you may feel too cold. So either inside or outside, you are in miserable condition. This is called adhyātmika.
Then adhibhautika. Just like we tried to stop the child disturbing. So the child is another living entity, I am another living entity, but she is causing some disturbance. Not the child... There are other living entities. In your country, of course, it is very less; in our India it is very prominent—mosquitoes, flies, bugs. They give trouble. Or some enemy or some other animal attacks you. This is called adhibhautika. Adhyātmika, adhibhautika then adhidaivika. Adhidaivika means all of a sudden there is earthquake or famine or too much rain or no rain. Daivika means it is..., we have no control over it. So there are so many. These are the big heading of miserable condition: adhyātmika, adhibhautika, adhidaivika. And there are many, many other categories. And ultimately, as Kṛṣṇa points out, janma-mṛtyu-jarā-vyādhi-duḥkha-doṣānudarśanam (BG 13.9). You may have solved all other problems. Very good. But what about your birth, death, disease and old age? These are the intelligent questions. We have to answer. We have to make solution.
Then you say that "This material world is very nice." But if you are always faced with so many problems and still you say that "Material world is very nice," so what you are? Foolish. You do not know what is the meaning of pleasure. Ānandamayo 'bhyāsāt (Vedānta-sūtra 1.1.12). God is ānandamaya, always full of pleasure. You will see Kṛṣṇa's picture. Just see so many pictures—ānandamaya. He is sitting down on a small rock and enjoying the association of the small animals. Just see. They are also coming to Kṛṣṇa. Simply by touching Him, they are feeling blissfulness. And Kṛṣṇa also embracing, "Yes, come on." So this is ānandamaya. Both of them are enjoying. Kṛṣṇa as a child in the lap of Mother Yaśodā—enjoying. Then Kṛṣṇa as a friend of Rādhārāṇī, He's enjoying. So you'll find always Kṛṣṇa enjoying. This is Vṛndāvana.