Galatians 6:9

"And let us not be weary in well-doing; for in due season we shall reap, if we faint not. So then as we have opportunity, let us work that which is good toward all men, especially toward them that are of the household of faith." Lest any one should suppose that their Teachers were to be cared for and supported, but that others might be neglected, he makes his discourse general, and opens the door of this charitable zeal to all; nay, he carries it to such a height, as to command us to show mercy both to Jews and Greeks, in the proper gradation indeed, but still to show mercy. And what is this gradation? it consists in bestowing greater care upon the faithful. His endeavor here is the same as in his other Epistles; he discourses not merely of showing mercy, but of doing it with zeal and perseverance, for the expressions of "sowing" and of "not fainting" imply this. Then, having exacted a great work, he places its reward close at hand, and makes mention of a new and wondrous harvest. Among husbandmen, not only the sower but also the reaper endures much labor, having to struggle with drought and dust and grievous toil, but in this case none of these exist, as he shows by the words, "for in due season we shall reap, if we faint not." By this means he stimulates and draws them on; and he also urges and presses them forward by another motive, saying, "As we have therefore opportunity, let us do good." As it is not always in our power to sow, so neither is it to show mercy; for when we have been carried hence, though we may desire it a thousand times, we shall be able to effect nothing more. To this argument of ours the Ten Virgins (Mat. xxv: 1 ff) bear witness, who although they wished it a thousand times, yet were shut out from the bridegroom, because they brought with them no bountiful charity. And so does the rich man who neglected Lazarus (Luke xvi: 19.) for he, being destitute of this succor, although he wept and made many entreaties, won no compassion from the Patriarch, or any one else, but continued destitute of all forgiveness, and tormented with perpetual fire. Therefore he says, "as we have opportunity, let us work that which is good toward all men," hereby especially also setting them free from the narrow-mindedness of the Jews. For the whole of their benevolence was confined to their own race, but the rule of life which Grace gives invites both land and sea to the board of charity, only it shows a greater care for its own household.