Some way or other, you know that he is a physician. So similarly, you have to find out guru. Guru . . . First of all, who requires a guru? That is the question. Because guru is not a fashion . . . The . . . It is said in the Śrīmad-Bhāgavatam, tasmād guruṁ prapadyeta (SB 11.3.21): "On account of this, you should go to a guru." What is that account? Tasmād guruṁ prapadyeta jijñāsuḥ śreya uttamam: "One who is very much inquisitive to know about spiritual affair, he requires a guru." Spiritual affair means that . . . We are in this material world. We are suffering. When the question will come in one's mind, "Why I am suffering?" that is spiritual. Just like an animal is being taken to the slaughterhouse. He cannot inquire, "Why I am being taken to the slaughterhouse?" But if a man is being taken forcibly, he'll protest, he will cry, he'll call crowd. Therefore human being can inquire about spiritual affair.
So when there is spiritual inquiry, then one requires a guru. And by going to guru, as it is stated, tad viddhi praṇipātena paripraśnena sevayā (BG 4.34). One has to learn by surrendering, praṇipāta. So first of all there must be a strong impulse to inquire about the transcendental subject matter. Then one requires a guru. Not that to follow a fashion that one has guru. Ācāryavān puruṣo veda. Unless one becomes under the control of ācārya, he has no perfect knowledge. Therefore the Vedas says, tad-vijñānārthaṁ sa gurum evābhigacchet (MU 1.2.12): "For understanding that transcendental science, one must approach a guru." And what is the symptom of guru? Samit-pāṇiḥ śrotriyaṁ brahma-niṣṭham: guru means one who has complete knowledge of Vedic version; and not only that, he is a staunch or fixed-up devotee of the Supreme Lord. These are the qualification. The guru strictly follows the Vedic injunction and teaches the same thing to his disciple. That is guru.