In plain words
Amutaṉār: To drive off the darkness of ignorance born of outward things, which torments us, Poykai, our generous benefactor, on that day [at Tirukkōvalūr] joined the meaning at the inmost core of the Veda with pure Tamil, twisted them into one wick and lit a holy lamp [the First Tiruvantāti]. Rāmānuja, the supreme one who keeps that lamp within his own holy heart, is our master.