only what we hear from guru/Krishna

Prabhupada: Yes. Preaching, preaching, you will become perfect preacher. Preach only what you have heard from Krsna and guru, that's all. Don't add and subtract. Then you are secure. And if you add some concoction, just like somebody says that "I may do whatever I like independently. If I chant, then everything is all right," this is nonsense addition. It is not the fact. That is the danger. Some inexperienced man, he introduces some concoction. Sometimes they say, "Prabhupada said it." [laughs] More misleading.    (More...)