We say everything definitely. How I can say definitely? Because I have heard it from Kṛṣṇa. The example I have given: The child, he asks his father, "Father, what is this?" Father says, "My dear child, it is called microphone." So he understands this instrument is called microphone. So next time, when he says, "This is microphone," that is correct. Although he is child—he has no knowledge—but when he says that "This is microphone," it is correct. This is the process. He is a child. He does not know what it is. But the father has said; he has taken it. And then he is correct.
Similarly, the spiritual master, he . . . everyone can become spiritual master if he presents the instruction as it is. Not that "I am now advanced. I can change the process what I received from spiritual master." That is rascaldom. No. You cannot change. You cannot improve. That is rascaldom. A spiritual master also does not change the words of Kṛṣṇa and makes any improvement upon it. Improvement . . . there is no question of improvement. But sometimes, according to time, circumstances, country, candidate, there is some trick or some ways just to . . . real business is one must take to Kṛṣṇa consciousness. That is real business. So sometimes we have to adopt some means which will help us to distribute the Kṛṣṇa consciousness movement. That is different thing. But on principle we cannot change the words.