Following the orders of Sri Caitanya Mahaprabhu, one who preaches the glories of the Lord all over the world or all over the universe should be humbler than grass and more tolerant than a tree because a preacher cannot live an easygoing life. Indeed, a preacher must face many impediments. Not only is he sometimes cursed, but sometimes he must also suffer personal injury. For example, when Nityananda Prabhu went to preach Krsna consciousness to the two roguish brothers Jagai and Madhai, they injured Him and made His head bleed, but nevertheless He tolerantly delivered the two rogues, who became perfect Vaisnavas. This is the duty of a preacher. Lord Jesus Christ even tolerated crucifixion.

From Srila Prabhupada’s purport to SB 6.5.44