Present days it is difficult to accept guru for us becos of "egos, logic, mind , intellect". It is the guru who opens door of wisdom for us. But to get a real guru who is a brahma gyani is really difficult like shirdi sai baba, swami nityananda of ganeshpuri, gajanan maharaj, rammana maharishi, swami sammarth, swami dayanand saraswati, swami vivekanand.
The relation between a shishya and guru cannot be quantified unlike any worldly relations.A guru even after leaving the physical forms looks after the welfare of his shishya. In words of great swami nityananda :
"Gurudev would tell his devotees "You are all taken care with the eyes of a tortoise". Thereby, he allied to the belief that a tortoise, from a distance would concentrate on its eggs and make them hatch. Only great Sadgurus have the ability to concentrate on their devotees at far-off places and make them capable of self-realisation. At times, Gurudev, would tell some of his keen devotees. The study of books does not accomplish much. The wisdom of the brain is very important. More than that is the nectar of wisdom gained through Sadhana-spiritual meditation". To some special devotees, he once said that Swami Vivekananda had said and taught all that was worth saying and teaching. He did not leave anything for others to preach". Once to a party of sincere devotees he said, "Study the Gita, learn renunciation, concentration and maintain a clean, pure "bhavana" and to the introvert Sadhakas, Gurudev would always advise, "practise intense meditation".
About the necessity of guru shri sai baba of shirdi has said
On the first day of my(hemadpant) arrival in Shirdi, there was a discussion between me and Balasaheb Bhate regarding the necessity of a Guru. I contended, "Why should we lose our freedom and submit to others? When we have to do our duty, why a Guru is necessary? One must try his best and save himself. What can the Guru do to a man who does nothing but sleeps indolently?" Thus I pleaded freewill, while Mr. Bhate took up the other side, viz., Destiny, and said, "Whatever is bound to happen must happen; even great men have failed, man proposes one way, but God disposes the other (contrary) way. Brush aside your cleverness; pride or egoism won’t help you." This discussion, with all its pros and cons went on for an hour or so, and as usual no decision was arrived at. We had to stop the discussion ultimately as we were exhausted. The net result of this was that I lost my peace of mind and found that unless there is strong body-consciousness and egoism, there would be no discussion; in other words, it is egoism which breeds discussion.
Then when we went to the Masjid with others, Baba asked Kakasaheb Dixit the following: -
"What was going on in the (Sathe’s) Wada? What was the discussion about?" and staring at me, Baba further added, "What did this Hemadpant say?"
Hearing these words, I was much surprised. The Masjid was at a considerable distance from Sathe’s Wada where I was staying and where the discussion was going on. How could Baba know our discussion unless He be omniscient and Inner Ruler of us all?
About the Necessity of a Guru
Hemadpant has left no note, no memo about what Baba said regarding this subject, but Kakasaheb Dixit has published his notes regarding this matter. Next day after Hemadpant’s meeting with Sai Baba, Kakasaheb went to Baba and asked whether he should leave Shirdi. Baba Said, "Yes". Then someone asked - "Baba, where to go?" Baba said, "High up." Then the man said, "How is the way?" Baba said, "There are many ways leading there; there is one way also from here (Shirdi). The way is difficult. There are tigers and wolves in the jungles on the way." I (Kakasaheb) asked - "But Baba, what if we take a guide with us?" Baba answered, - "Then there is no difficulty. The guide will take you straight to your destination, avoiding wolves, tigers and ditches etc. on the way. If there be no guide, there is the danger of your being lost in the jungles or falling into ditches." Mr. Dabholkar was present on this occasion and he thought that this was the answer Baba gave to the question whether Guru was a necessity (Vide Sai Leela Vol. I, No.5, Page 47); and he thereupon took the hint that no discussion of the problem, whether man is free or bound, is of any use in spiritual matters, but that on the contrary real Paramartha is possible only as the result of the teachings of the Guru, as is illustrated in this chapter of the original work in the instances of great Avatars like Rama and Krishna, who had to submit themselves to their Gurus, Vasishtha and Sandipani respectively, for getting self- realization and that the only virtues necessary for such progress are faith and patience. (Vide Sai Satcharita, Ch. II, 191-92).
There are beautiful videos of swami nityananda of ganeshpuri, paramhansa yogananda, rammannna rishi on you tube. It is worth watching.
faith & patience alone ferry us across this ocean.This beautiful relation is best portrayed in Sai charitra, Guruchritra and autobiography of yogi by paramhansa yogananda.Due to paucity of time i am not able to write, hope in future by gods grace i will write in great details by gurus guidance