Lord Caitanya came to reveal, through the chanting of the holy name, the spiritual world and the mood in which the residents of that world render devotional service. He also made devotional service to Krishna attractive by showing His own absorption in it and especially in thoughts of Krishna in the mood of the gopis. When devotees saw Lord Caitanya’s ecstasy, they themselves would cry. Making Krishna attractive was Lord Caitanya’s mercy.
LFD Vol 2 Pg 244, The Lord's merciful glance, Paragraph 1