Pujya Deepakbhai describes the spiritual components that make Gnan Vidhi effective: the knowledge of the Soul given during the Gnan Vidhi ceremony, and the grace of a living Gnani.

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In English: https://www.dadabhagwan.org/path-to-happiness/spiritual-science/who-am-i-realize-your-true-self/
In Gujarati: https://www.dadabhagwan.in/path-to-happiness/spiritual-science/who-am-i-realize-your-true-self/
In Hindi: https://hindi.dadabhagwan.org/path-to-happiness/spiritual-science/who-am-i-realize-your-true-self/