By Deeksha I mean the process of accepting the Gopala Mantra and the Radha mantra from a Sadhguru (God-realised Vaishnava saint) as per the Gaudiya Vaishnava tradition as established by the 6 major Parivaras accepted by Sriman Chaitanya Mahaprabhu. The Deeksha process is always preceded by the Harinama Samskaar. When someone in full cognizance accepts Deeksha it should be clear that Sri Krishna accepts that person as His own. Harinama gives one the qualification of a Vaishnava whereas Deeksha ensures ones entrance into the eternal pastimes in the Madhura rasa in the mood of Sri Guru Manjari who is the personal maid-servant of Sri Praneswari.
Even before one attains Deeksha one must follow the principle of surrender. If a person takes Deeksha and then remains attached to material things, Krishna becomes dissatisfied. A surrendered devotee after Deeksha is considered to have been accepted by Krishna because the Guru, Krishna and Bhakti Devi are at an equal platform. Whether a Guru is giving Deeksha to one or whether Krishna is accepting you, is one and the same thing. This is not exactly the same understanding when one simply receives Hari Nama Samskaar which is initial cleansing of the ears and the heart, preparing the heart to receive Deeksha.
In the Bhakti Sandarbha, Srila Jiva Goswami explains clearly that the guru imparts “vijnana” (The realization behind the science); which has two aspects: Aspect of the Lord’s nature and the aspect of the Lord’s specific relationship aspect. A person who accepts Deeksha should only accept shiksha or devotion based knowledge directly from Deeksha guru. One should learn from such a Sadhguru of how to render service as well as how to serve Guru directly. One should not apply one’s limited intelligence to please Guru. One has to understand only from Guru as to how to serve him and that is the only way. In this way a person after undertaking Deeksha when serves Guru without duplicity or cheating propensity, will become a perfect vessel for his grace. Then follows vijnana; the knowledge of that which is hidden in the Shastras never directly spelt out which is confidential, available to the true servant of Guru and Bhagawan. When after Deeksha there is oneness in the heart of the Guru and the disciple, the disciple’s life rotates around the Guru without concern for one’s own trivial needs. However nowadays, the guru-shishya (Guru-disciple) relationship has become business like only. When a disciple starts looking at the world in-relationship with Guru, one will be inundated to the core with divine knowledge which appears in the disciple’s heart as deeply felt realizations. These realizations will serve as passport to the Spiritual realm.
As part of Deeksha one needs to realize that the mantra, guru and the deity are not 3 but one. Other than the path of Uttama Bhakti all other aspects are to be considered imaginary. In Uttama Bhakti the name, form, qualities of Bhagawan, the Abhideya (process), Maya everything is defined in black and white. Hence there are no overlaps or confusions whatsoever. The process gets us the realization. Uttama Bhakti is the road of practical experience. Everything depends on one’s own truthfulness and sincerity. When one desires to serve with utmost surrender; by the grace of Bhagawan, realizations other-worldly manifest. Such a qualification yet can only come by the pleasure of the Sadhguru. If the disciple treats the Sadhguru as he would treat Bhagawan seeing absolutely no difference in them with no other motive it is simply possible to realize Shastra directly without reading even a word of Shastra.