CC Antya 3.51 purport:
Those who are following in the footsteps of Sri Caitanya Mahaprabhu should take the Lord’s mission most seriously. … One who identifies himself as a follower of Sri Caitanya Mahaprabhu should feel like Sri Caitanya Mahaprabhu, who said, iha-sabara kon mate ha-ibe nistara: “How will all these yavanas be delivered?”

CC Adi 9.39 purport:
Therefore those who are actually servants of Sri Caitanya Mahaprabhu must seriously distribute this movement all over the world to render the greatest benefit to human society.