A true disciple is very rare, for in no time he goes beyond the need for a Guru, by finding his own self. Don’t waste your time on trying to make out whether the advice you get flows from knowledge only, or from valid experience. Just follow it faithfully. Life will bring you another Guru, if another is needed. Or deprive you of all outer guidance and leave you to your own lights. It is very important to understand that it is the teaching that matters, not the person of the Guru. You get a letter that makes you laugh or cry. It is not the postman who does it. The Guru only tells you the good news about your real Self and shows you the way back to it. In a way the guru is its messenger. There will be many messengers, but the message is one: be what you are. Or you can put it differently: until you realize yourself you cannot know who is your real Guru. When you realize, you find that all the Gurus you had have contributed to your awakening. Your realization is the proof that your Guru was real. Therefore, take him as he is, do what he tells you, with earnestness and zeal and trust your heart to warn you if anything goes wrong. If doubt sets in don’t fight it. Cling to what is doubtless and leave the doubtful alone.
Sri Nisargadatta Maharaj