Since omkara is the basic principle of all Vedic knowledge, it is uttered before one begins to chant any Vedic hymn. Without omkara, no Vedic mantra is successful

Expressions researched:
"Since omkara is the basic principle of all Vedic knowledge, it is uttered before one begins to chant any Vedic hymn. Without omkara, no Vedic mantra is successful"

CC Adi-lila

Since oṁkāra is the basic principle of all Vedic knowledge, it is uttered before one begins to chant any Vedic hymn. Without oṁkāra, no Vedic mantra is successful. The Gosvāmīs therefore declare that praṇava (oṁkāra) is the complete representation of the Supreme Personality of Godhead, and they have analyzed oṁkāra in terms of its alphabetical constituents.

CC Adi 7.128, Translation and Purport:

“The Vedic sound vibration oṁkāra, the principal word in the Vedic literatures, is the basis of all Vedic vibrations. Therefore one should accept oṁkāra as the sound representation of the Supreme Personality of Godhead and the reservoir of the cosmic manifestation.

In the Bhagavad-gītā (8.13) the glories of oṁkāra are described as follows:

oṁ ity ekākṣaraṁ brahma vyāharan mām anusmaran

yaḥ prayāti tyajan dehaṁ sa yāti paramāṁ gatim

This verse indicates that oṁkāra, or praṇava, is a direct representation of the Supreme Personality of Godhead. Therefore if at the time of death one simply remembers oṁkāra, he remembers the Supreme Personality of Godhead and is therefore immediately transferred to the spiritual world. Oṁkāra is the basic principle of all Vedic mantras, for it is a representation of Lord Kṛṣṇa, understanding of whom is the ultimate goal of the Vedas, as stated in the Bhagavad-gītā (vedaiś ca sarvair aham eva vedyaḥ (BG 15.15)). Māyāvādī philosophers cannot understand these simple facts explained in the Bhagavad-gītā, and yet they are very proud of being Vedāntīs. Sometimes, therefore, we refer to the Vedāntī philosophers as Vidantīs, those who have no teeth (vi means "without," and dantī means "possessing teeth"). The statements of the Śaṅkara philosophy, which are the teeth of the Māyāvādī philosopher, are always broken by the strong arguments of Vaiṣṇava philosophers such as the great ācāryas, especially Rāmānujācārya. Śrīpāda Rāmānujācārya and Madhvācārya break the teeth of the Māyāvādī philosophers, who can therefore be called Vidantīs, "toothless."

As mentioned above, the transcendental vibration oṁkāra is explained in the Bhagavad-gītā, Chapter Eight, verse thirteen:

oṁ ity ekākṣaraṁ brahma vyāharan mām anusmaran

yaḥ prayāti tyajan dehaṁ sa yāti paramāṁ gatim

"After being situated in this yoga practice and vibrating the sacred syllable oṁ, the supreme combination of letters, if one thinks of the Supreme Personality of Godhead and quits his body, he will certainly reach the spiritual planets." If one actually understands that oṁkāra is the sound representation of the Supreme Personality of Godhead, whether he chants oṁkāra or the Hare Kṛṣṇa mantra, the result is certainly the same.

The transcendental vibration of oṁkāra is further explained in the Bhagavad-gītā, Chapter Nine, verse seventeen:

pitāham asya jagato mātā dhātā pitāmahaḥ

vedyaṁ pavitram oṁkāra ṛk sāma yajur eva ca

"I am the father of this universe, the mother, the support and the grandsire. I am the object of knowledge, the purifier and the syllable oṁ. I am also the Ṛg, the Sāma and the Yajur Vedas."

Similarly, the transcendental sound oṁ is further explained in the Bhagavad-gītā, Chapter Seventeen, verse twenty-three:

oṁ tat sad iti nirdeśo brahmaṇas tri-vidhaḥ smṛtaḥ

brāhmaṇās tena vedāś ca yajñāś ca vihitāḥ purā

"From the beginning of creation, the three syllables oṁ tat sat have been used to indicate the Supreme Absolute Truth (Brahman). They were uttered by brāhmaṇas while chanting Vedic hymns and during sacrifices for the satisfaction of the Supreme."

Throughout all the Vedic literatures the glories of oṁkāra are specifically mentioned. Śrīla Jīva Gosvāmī, in his thesis Bhagavat-sandarbha, says that in the Vedic literature oṁkāra is considered to be the sound vibration of the holy name of the Supreme Personality of Godhead. Only this vibration of transcendental sound can deliver a conditioned soul from the clutches of māyā. Sometimes oṁkāra is also called the deliverer (tāra). Śrīmad-Bhāgavatam begins with the oṁkāra vibration: oṁ namo bhagavate vāsudevāya. Therefore oṁkāra has been described by the great commentator Śrīdhara Svāmī as tārāṅkura, the seed of deliverance from the material world. Since the Supreme Godhead is absolute, His holy name and His sound vibration oṁkāra are as good as He Himself. Caitanya Mahāprabhu says that the holy name, or oṁkāra, the transcendental representation of the Supreme Personality of Godhead, has all the potencies of the Personality of Godhead.

nāmnām akāri bahudhā nija-sarva-śaktis

tatrārpitā niyamitaḥ smaraṇe na kālaḥ