। ॥
In plain words
Within myself I hold to the secret of the Vedas, the nectar to the eyes of the first Person who dwells at the foot of the mango tree, whose festival of youth has just begun.
Word for word
Of the one living at the mango tree's root, of the primal Person, the nectar of the eyes, the youth-festival begun, the secret of the Āmnāya, within I hold.