Once Shankara waited for one of his disciples to start his talk. Other disciples told Shankara that he is not worth that wait, as he had never talked till then. The disciple arrived, singing with hand-clapping. As totakacharya (as he was called later) sang about Shankara, other disciples realized his depth of knowledge and prostated before him.
When a person speaks less, it does not mean less knowledge. None knows in which person what knowledge resides. It’s always better to be humble, seeking, learning from all. Totaka ashtakam describes shankara’s characteristics which also fits to mahaperiyava.
Totaka-ashtakam translation sung in tamil, essence in english, with maha-periyava’s discourse