When they should be hated, discarded, reproached, and anathematized: and leap for joy; as if the greatest honour and happiness imaginable had been conferred on them; and as persons do, when in the greatest rapture: for behold, your reward is great in heaven.
Not of debt, but of grace; for there is no proportion or comparison between what the saints suffer for Christ, and the glory that shall be revealed in them by him; not in earth, but in heaven. Saints must not expect their reward here, but hereafter, when God himself will be their reward; he will be all in all; Christ and all his glory, glory and all the riches of it will be the reward of the inheritance, and which must needs be a "great" one. And the more to animate them to suffer with joyfulness, and to support them under all their reproaches and persecutions
[Excerpt from Gill's Exposition]