Sri Chaitanya Mahaprabhu’s special mission is the deliverance of all fallen souls in Kali-yuga. Devotees of Krishna must persistently seek the favor and mercy of Sri Chaitanya Mahaprabhu to become fit to return home, back to Godhead.
Madhya Lila 14.16
Lord Caitanya has given the greatest boon: in this age one simply has to chant the holy name of God to attain perfection in spiritual life.
Srimad Bhagavatam 3.21.7,
This process of chanting is the best process of self-realization in this age; therefore Lord Caitanya preached it so nicely for the benefit of all humanity.
Srimad Bhagavatam 3.24.35,
This avatara of the Lord does not kill the miscreants, but delivers them by His causeless mercy.
The wild tigers, elephants, bear and deer all together accompanied the Lord, and the Lord accompanied them in sankirtana. By this He proved that by the propagation of the sankirtana movement (congregational chanting and glorifying of the name of the Lord) even the wild animals can live in peace and friendship, and what to speak of men who are supposed to be civilized.
Srimad Bhagavatam Introduction.
Lord Caitanya declares a war against Kali Yuga with "the bow" "the six Goswamis", by pulling back "the string" "Bhakti Vinod Thakur" making a thunderous sound, puts "the long strong arrow" "Bhakti Siddhanta Saraswati Thakur", having "the direction giving feather back of the arrow" "Sri Gaur Kishore Das Babaji Maharaj" and "the sharp penetrating arrow front" "Srila A.C.Bhakti Vedanta Swami Prabhupada".