John Chrysostom — as excerpted in the Catena Aurea on Matthew 10:21-22

“What follows is yet more dreadful, Ye shall be hated of all men; they sought to exterminate them as common enemies of all the world. To this again is added the consolation, For my name’s sake; and yet further to cheer them, Whosoever shall endure to the end, he shall be saved. For many are hot and zealous in the beginning, but afterwards grow cool, for these, He says, I look at the end. For where is the profit of seeds that only sprout at first? wherefore He requires a sufficient endurance from them.”