CC Ādi 16.8
yāhāṅ yāya, tāhāṅ laoyāya nāma-saṅkīrtana
Although Lord Śrī Caitanya Mahāprabhu and His devotees in disciplic succession can defeat all kinds of learned scholars, scientists and philosophers in arguments, thus establishing the supremacy of the Personality of Godhead, their main business as preachers is to introduce saṅkīrtana everywhere. Simply to defeat scholars and philosophers is not the occupation of a preacher. Preachers must simultaneously introduce the saṅkīrtana movement, for that is the mission of the Caitanya cult.