In plain words
Childhood and the ages after it, waking and the states after it: all of them turn and change, yet he stays present through every one, shining within as ‘I’ always. To those who fall at his feet he shows himself by the gesture of knowledge. Homage to that Dakshinamurti, the Guru whose eye is fire. Tamil explanatory prose: Childhood and the ages after it, waking and the states after it, and every other condition come and go by turns. Through them all he remains present, unchanging, and shines within as ‘I’ always. By the gesture of knowledge he makes that self of his clear to those who take refuge in him. Salutation to that Guru Dakshinamurti, whose eye is the fire of knowledge.
Word for word
Although all the many states, beginning with childhood and with waking, change, He remains present throughout, always shining within as ‘I’. He reveals himself through the gesture of consciousness to those who fall at his feet. Homage to that Dakshinamurti, the Guru with the fiery eye.