Guru means tattva-darśī. Tattva-darśī. Otherwise he's useless, waste of time. One has seen the tattva. Vadanti tat tattva-vidas tattvaṁ yaj jñānam advayam, brahmeti paramātmeti (SB 1.2.11). Guru means one who knows what is Brahman, what is Paramātmā, what is Bhagavān—not partial knowledge. The jñānīs, the so-called jñānīs, they reach up to the brahma-jyotir, that's all. But that is not complete knowledge. The yogīs, they reach, utmost, Paramātmā. That is also not complete. Better than the jñānīs, but it is not complete. Brahmeti paramātmeti bhagavān iti. When he comes to the platform to understand the Supreme Personality of Godhead, then that is bhakti. That is bhakti. Therefore Kṛṣṇa says:
- yoginām api sarveṣāṁ
- mad-gatenāntaratmānā
- śraddhāvān bhajate yo māṁ
- sa me yuktatamo mataḥ
- (BG 6.47)
So if you want to be first-class yogī, always think of Kṛṣṇa within your mind. Do not make friendship, that you have become very much advanced: "Now my mind is controlled." It is not so easy, sir. Therefore it is warned, na kuryāt karhicit. Never trust your mind. Always distrust. In any moment it, the mind, can drag you. The example is given here, caskanda tapa aiśvaram. Yad-viśrambhāc cīrṇaṁ caskanda tapa aiśvaram. Even Lord Śiva—he is called Mahadeva; not only deva, but Mahādeva—he became captivated by seeing the young woman's incarnation, Mohinī-mūrti. Became so much captivated. The description is there in the Śrīmad-Bhāgavatam. But as soon as the Mohinī-mūrti demonstrated the features of the breast, immediately Lord Śiva became so mad that he forcibly went there and embraced, and there was discharge, Lord Śiva. And what to speak of us? What we are? (laughter) Therefore it is . . . Lord Śiva is all right, but by their example they are teaching us that "A personality like me become victimized by this māyā's influence. What you are?" Why you should trust and make friendship with your mind, that "I am now complete," artificially? Don't do that. Therefore it is warned, na kuryāt. Na kuryāt karhicit. Never trust your mind; always try to control. And the easiest method recommended in the śāstra and confirmed by Śrī Caitanya Mahāprabhu—harer nāma harer nāma harer nāma iva kevalam, kalau nāsty eva nāsty . . .