Following is the extract from discourse of Param Poojya Aniruddha Bapu held on 12th November 2010.
The pravachan centred on one of the Vishnu-Sahastranaams "ॐ मन्त्राय नमः" ("Om Mantraya Namah"). P. P. Bapu began His discourse by describing various characteristics of Mantras. He said that ॐ or Om is the Adi Mantra or the basic mantra. This is the first form that Lord Parmatma took (When Big-Bang occurred and Universe was created, the sound of big-bang was ॐ).
Bapu further listed 8 Beej Mantra as follows:
1) "ऐइम" or "Aeim"
2) "ह्रीम" or "Hrim",
3) "क्लिम" or "Clim"
4) "श्रिम" or "Shrim"
5) "क्रिम" or "Crim"
6) "द्राम" or "Dram"
7) "स्त्रिम" or "Strim"
8) "ग्लौम" or "Gloum"
Bapu further said that "अ" to "रु" form the swars (sounds) and are termed as Hetu Beej and all vyanjans (व्यंजन) are Karya Beejs. Bapu explained that Sanskrit is a language which has not evolved naturally but has been specifically composed and devised by great Rushis namely Agastya Rushi and Vashishtha Rushi which is completely filled with specific Vibrations, Frequencies, etc. Sanskrit is pregnant with holiness (पावित्र्य), Purity (शुद्धता), strength (बल), Rules of Universe, 8 अष्टबीज ऐश्वर्ये (Ashtabeej Aishwarye), and नव-अंकुर ऐश्वर्ये (Nav Ankur Aishwarye) of Lord Parmatma. The Vyanjans instead of making us work, work directly in our life. The अष्टबीज ऐश्वर्ये know how to make other beejs work and bind them. A Mantra essentially is composed of all the above characters.
Sanskrit is such is language, which as described earlier is composed by Agastya Rushi and Vashishtha Rushi but Lord Parmatma's Saraswati shakti got this work done from these two great sages. Lord Parmatma in His Paramshiv form (Avtar) has described the pronunciation of Sanskrit and Devarshi Narad has first pronounced it.
Further Bapu said that Sanskrit has a special character that apart from व्याकरण (Grammar) it has वैय्याकरण (Vaiyyakaran) . Vaiyyakaran is the science of searching the relation between words and their basic form i.e. in simple words it describes the meaning of the words which our heart and not the mouth wants to convey.
Reciting religious hymns, verses, etc is Sanskrit is always beneficial but reciting them in other languages (if one is genuinely not comfortable with Sanskrit) is also considered of same effect, as most of the Indian languages and even other languages like English and German have been derived from Sanskrit and hence has all its properties of Sanskrit embedded in them. But still reciting in Sanskrit is considered 100% complete and reciting it in other languages is considered 99% complete and the difference between this 99 to 100 percentage is same as the difference between 1 and 99 percentage. Now if one starts speaking in Sanskrit it will not be considered as he his life has become Mantramay (filled with Lord) as Sanskrit as described above is based on Vaiyyakaran and not Vyakaran. Intension and Reason are always important in Sanskrit.
Then Bapu described 8 Properties of "What can be Called a Mantra?"
1) A Mantra has to be based and worked on principle of "Purity is the only Reference" (पावित्र्य हेच प्रमाण).
2) The author of the Mantra should not have the feeling and consideration (ego) either before or after composing the Mantra that He has composed it. He should always bear the thought in mind that this work is done from him by Lord Parmatma.
3) When the Mantra is pronounced is effects should not be contradictory on two different individuals. i.e. while prospering the person who chants it, it should not harm or destroy some other person.
4) The Mantra should act on all the three forms of our human body i.e. त्रिविध देह (Tri Vidh Deh) i.e. Actual (भौतिक), Pranmay (प्राणमय) and Mind (मनोमय).
6) Time and Place (direction) should have no effect on the Mantra but rather Mantra should have effect on them.
7) The Mantra should have power to encourage and strengthen all the 108 centres in the human body even if he is the sinner of sinners. This evaluation of Mantra can only be done by Rushis and not any common man.
8) Finally most importantly, the Mantra should have expression and expansion (विलास) of atleast one of the ashta beejs.
Taking the above points into consideration one should not be fooled to accept any Sanskrit text as Mantra. Just by attaching prefixes and suffixes like नाथाय नमः (Nathaya Namah) or महाराजाय नमः (Maharajaya Namah) by any person to his name of any other words they do not become Mantra and the person claiming to be Jagatguru and Sadguru is not the real Sadguru.
Finally Bapu illustrated Mantra with example and said that "ॐ कृपासिन्धु श्री साईं नाथाय नमः" ("Om Krupa Sindhu Shri Sai Nathaya Namah") and "ॐ अभयदाता श्री स्वामी सामर्थ्य नमः" ("Om Abhaydata Shri Swami Samarthaya Namah") are the Genes of Aniruddha Upasana Trust. They contain all the ashta beejs. Along with these two "ॐ मनः सामर्थ्यदाता श्री अनिरुद्धाय नमः" is also the mantra which contains all the 8 Ashta Beejs.
Bapu further described "ऐइम" or "Aeim" and "ग्लौम" or "Gloum" beejs as two Guru Beejs. ॐ कृपासिन्धु श्री साईं नाथाय नमः mantra travels and acts from ऐइम to ग्लौम beej and ॐ अभयदाता श्री स्वामी सामर्थ्य नमः mantra travels and acts from ग्लौम to ऐइम beej. This does not mean they act against each other but they actually have strengths of acting in two diverse conditions. Whereas ॐ मनः सामर्थ्यदाता श्री अनिरुद्धाय नमः is as loving as the name in it is. This mantra fits all requirements the beej mantras from ऐइम to ग्लौम according to need of the person. It cultivates that stuff which is otherwise impossible to cultivate. This mantra would inculcate devotion in you even if you don't recite with devotion while chanting.
Before ending His discourse Bapu said that He was made by Goddess Chandika and Lord Dattaguru before everything was made. Though so far we have only understood Ashta Beejs there is actually the 9th beej as well and that is the word "Dattaguru". Bapu has rightfully demanded this beej from His Dattaguru. This beej also belongs to all those Shraddhavans who love Bapu. This 9th Beej Mantra i.e. Dattaguru is completely impregnated with all the 8 Beejs Mantras, Hetu Beejs and Kaaran (Reason) Beejs described previously.