Prefatory 0
In plain words
The Lord who is the Self taught this revelation of Self-realisation to Guha. That same primordial source, abiding in me as the Self, now gives voice to it in Tamil.
Word for word
This is the Atma Sakshatkara that the Lord, who is the Self, graciously imparted to Guha. The primal One, the first source, abiding within me as the Self, now speaks [it] in Tamil.