Bhagavad-gītā is also Veda. It is spoken by Kṛṣṇa. So you cannot make any addition, alteration. You must take it as it is. Then you get the right knowledge. Vedas, how. . . The example is given, perhaps you know, several times, that the Vedas, how it should be accepted as it is, without interpretation. Just like Vedas says that if you touch stool, immediately you have to take your bath. You have become impure. This is Vedic injunction. If you touch bone, then you have become impure. You have to take your bath immediately, full. Then Vedas say, "Now, the stool of cow is pure, cow dung." Now, with your reason you can say, "First of all you said that stool is impure, and as soon as you touch you must take your bathing; otherwise you remain impure. So another stool, cow stool, you say pure? This is contradiction. You say that the bone is impure, and you are keeping the bone in the Deity's room?" The conchshell is bone. You know this conchshell is a bone of an animal. So it is being used in the Deity room, and the cow dung is also used in the Deity room. Even Kṛṣṇa is smearing His whole body with cow dung. You know Kṛṣṇa's līlā. So if you say, argue, with your poor knowledge, then it becomes contradiction. One stool is good; another stool is bad. But because it is said by the Vedas, you have to accept it. This is Vedic knowledge. You cannot argue. There is no scope of argument. Whatever is said, you have to accept. Otherwise how Vedas become authority? You can change in your own way.
So therefore we say that if you want to take benefit by reading Bhagavad-gītā, then you should accept it as it is said. Don't try to interpret foolishly. Then you will never get the benefit. That is our propaganda.