"Ācārya, guru, he is completely surrendered to Kṛṣṇa. He has taken the shelter of Kṛṣṇa, being completely freed from all material affection. Brahmaṇy upaśamāśrayam. Everything... Everyone has got some material desire to fulfill, but a guru or ācārya has no such business. That is the symptom of ācārya. He has no more any material business. Brahmaṇy upaśamāśrayam. He has finished all business of material satisfaction. That is the symptom of ācārya. And śābde pare ca niṣṇātam. And he has taken full bath in the ocean of transcendental (indistinct). Śābde pare ca niṣṇātaṁ brahmaṇy upaśamāśrayam. Tasmād guruṁ prapadyeta (SB 11.17.27), one should surrender to such spiritual master. Jijñāsuḥ śreya uttamam, when he is actually serious about inquiring the transcendental subject matter. Otherwise there is no need of accepting guru or ācārya. He has no business.
If one is not interested in the transcendental subject matter... Just like so many people come, they have no interest. Unnecessarily they talk and waste time. As soon as I asked that man that 'If I say something, whether you will accept?' He said, 'If I like it, then I shall accept.' Then why come to waste my time to inquire from me? Therefore Bhagavad-gītā says, tad viddhi praṇipātena (BG 4.34). When you go to inquire something from a person, you must fully surrender there, or you must find out a person where you can fully surrender. Otherwise, don't put any questions. Your waste of time, his waste of time. Because he will not accept.
Suppose if you go to a physician, you are diseased, and the physician says, 'All right, I shall give you medicine.' And if you say, 'Yes, I shall accept the medicine if I like it,' then why do you go to that physician? What is the meaning? The physician, one physician doctor friend, long..., forty years ago, he prescribed one of my patent medicines. And the patient little protested because it is Indian-made. He was Eurasian. So as soon as he questioned, 'What is this medicine, Indian-made?' 'Yes, it is Indian-made. If you have no such faith, don't come to me.' He flatly said, 'Don't come to me.' That should be the position of the physician or ācārya. If you go there, you should accept whatever he says. If you are in doubt, then don't go there. That is the position. It is freedom. It is not that you have to accept some ācārya particular by canvassing. No, you should be inspired that 'Yes, here I can surrender, here I can gain something.' Then surrender. In the spiritual science, there is no bluffing. Everything must be very clear-cut. Otherwise it will be not very satisfactory."
(Srila Prabhupada Conversation, Vrindavan, March 10, 1972)