It is the pious duty of the Guru to ascertain whether the candidate has above qualifications. Without that Guru must not grant the initiation.
Presuming that a candidate has all the requisite qualifications, enumerated before, can he do Bhagavat-Seva, the worship/service of Shri Krishna without having the initiation of Brhma-Sambandha? No. It is not allowed, at least, in the Pushti-Bhakti-Sect. Initiation of Brahma-Sambandha is a formal sanction for starting the devotional course according to the principles set by Shri Vallabhacharya. Therefore, in religious sects the initiation is as necessary as obtaining admission in any educational institution. Having everything necessary for study e.g. books, pens, pencils, a compass-box etc. does not qualify a candidate to enter into school and start his course without obtaining formal admission from the school authority.
As said earlier, all beings in the world are the Amsha, Divine-particles, of the Supreme Being Shri Krishna. So by virtue of this relationship all beings are, by nature, humble attendants and servants of Bhagavan. Initiation of Brahma-Sambandha, therefore, does not establish this relationship, it just helps in recalling this forgotten relationship. So, after obtaining this initiation, a devotee gets united with Shri Krishna in the bond of Master-servant. Every relationship demands some kind of faith, affection, duty and sacrifice. By this initiation a devotee dedicates himself together with all his belongings and relationships to Shri Krishna. Now, what should be the next course for him? Shri Vallabhacharya states in his work “Siddhanta-Rahasya”:
Sevakanam yatha loke, vyavaharah prasiddhyati;
Tatha karyam samarpyaiva, sarvesam brahmata tatah.
Just as in this world everywhere,
Servants' duty to serve their masters is known well;
So should be done by one dedicating all to Bhagavan,
Thereby all things being related to Brahma become divine.
Meaning: Just as servants' duty to serve their lords is known well and has earned recognition everywhere in society, so one should do one's duty to serve Shri Krishna by dedicating all to Him. Thereby all things, as they come in contact with the Supreme Brahma, become divine.
This initiation is also known as ‘Atma-nivedana’. ‘Nivedana’ means to make known, to declare, to proclaim. Declaration of oneself along with one's animate and inanimate belongings in the favour of Shri Krishna is called ‘Atma-nivedan’ the declaration of the dedication of the self alongwith those that are related to self''. Initiation for Resort and Initiation for Self-declaration should be obtained from the qualified male descendents hailing from Shri Vallabhacharya only. Shri Vallabhacharya says in his work “Siddhanta-Rahasya”:
Brahma-sambandha-karanat, sarvesham deha-jivayoh,
Sarvadosha-nivrttir hi.
Meaning: By realizing the intimate relationship between Shri Krishna and the Jiva i.e. individual-soul, all flaws of body and soul are removed. They become divine.
Some children happen to be very mischievous by nature but their parents do not drive them away from home. This is because parents consider them as their own. Parents' natural affection for children restrict them to do so. Similarly, how-so-ever blemishes we may have in us, but on our having made “declaration of self-dedication”, Shri Krishna considers us His own and because of this He accepts our service without minding our drawbacks. Here, we should always keep in our mind that there is vast difference between the un-mindfulness of Shri Krishna and our being faultless.
The sacred formula i.e. Mantra of the Brahma-Sambandha initiation was accorded to Shri Vallabhacharya by Shri Krishna Himself.