You know the word master, teacher? When you go to schools, you say, Master, I have got this, this, and this question. Master, can you solve this problem for me? In India, instead of saying Master, we say Guru. Same thing. Master teaches you something. Master takes off your ignorance and puts some knowledge into your mind. Same way, a true Guru does that. He takes off all the ignorance, egos, from our mind and puts Knowledge. And peace he gives.