Source: Adishankar’s Vivekachudamani
देवदत्तोहमो त्य् एतद् विज्ञानं निरपेक्षकम्
तद्वद् ब्रह्मविदोप्य् अस्य ब्रह्माहम् इति वेदनम्
There are no qualifications necessary to know ones own name, and the
same is true for the knower of Gods knowledge that "I am God”.
Please check these: Excerpts from a discourse by our Sri Sri Muralidhara Swamiji
Incapability is the qualification! You should realize that you are incapable (of treading any spiritual path). AND, THAT IS THE ONLY QUALIFICATION REQUIRED. Chant this Divine Maha Mantra that has been advocated by our Shãstras. It is the easiest way
They might hesitate and ask, ‘Can I, who have committed innumerable grievous sins, utter the pure Name of the Lord?’ Such people need not hesitate or feel shy on this ground; they CAN sing the Divine Name of the Lord boldly and cheerfully!”
The learned pandits tried their hands in various sastras and tried to calculate the distance. Each one gave different answers. Then Peria dasar said "This is a simple answer! Its just at a calling distance !