BG 4.34

4.34 तत् That? विद्धि know? प्रणिपातेन by long prostration? परिप्रश्नेन by estion? सेवया by service? उपदेक्ष्यन्ति will instruct? ते to thee? ज्ञानम् knowledge? ज्ञानिनः the wise? तत्त्वदर्शिनः those who have realised the Truth.Commentary Go to the teachers (those who are well versed in the scriptures dealing with Brahman or Brahmasrotris? and who are established in Brahman or Brahmanishthas). Prostrate yourself before them with profound humility and perfect devotion. Ask them estions? O venerable Guru What is the cause of bondage How can I get liberation What is the nature of ignorance What is the nature of knowledge What is the AntarangaSadhana (inward spiritual practice) for attaining Selfrealisation Serve the Guru wholeheartedly. A teacher who is versed in the scriptures (Sastras) but who has no direct Selfrealisaiton will not be able to help you in the attainment of the knowledge of the Self. He who has knowledge of the scriptures and who is also established in Brahman will be able to instruct thee in that knowledge and help thee in the attainment of Selfrealisation. Mere prostrations alone will not do. They may be tinged with hypocrisy. You must have perfect faith in your Guru and his teaching. You must serve him wholeheartedly with great devotion. Now hypocrisy is not possible.

— vedicscriptures · exposition · source ↗

The path of spiritual realization is undoubtedly difficult. The Lord therefore advises us to approach a bona fide spiritual master in the line of disciplic succession from the Lord Himself. No one can be a bona fide spiritual master without following this principle of disciplic succession. The Lord is the original spiritual master, and a person in the disciplic succession can convey the message of the Lord as it is to his disciple. No one can be spiritually realized by manufacturing his own process, as is the fashion of the foolish pretenders. The Bhāgavatam (6.3.19) says, dharmaṁ tu sākṣād bhagavat-praṇītam: the path of religion is directly enunciated by the Lord. Therefore, mental speculation or dry arguments cannot help lead one to the right path. Nor by independent study of books of knowledge can one progress in spiritual life. One has to approach a bona fide spiritual master to receive the knowledge. Such a spiritual master should be accepted in full surrender, and one should serve the spiritual master like a menial servant, without false prestige. Satisfaction of the self-realized spiritual master is the secret of advancement in spiritual life. Inquiries and submission constitute the proper combination for spiritual understanding. Unless there is submission and service, inquiries from the learned spiritual master will not be effective. One must be able to pass the test of the spiritual master, and when he sees the genuine desire of the disciple, he automatically blesses the disciple with genuine spiritual understanding. In this verse, both blind following and absurd inquiries are condemned. Not only should one hear submissively from the spiritual master, but one must also get a clear understanding from him, in submission and service and inquiries. A bona fide spiritual master is by nature very kind toward the disciple. Therefore when the student is submissive and is always ready to render service, the reciprocation of knowledge and inquiries becomes perfect.

— vedicscriptures · exposition · source ↗