NOTES for Luk 6:27-38
Skeptics who rebel against Christianity and Christians often speak of self-interest. They say that, in doing good, Christians are concerned about a reward from above and do everything "for the promises of future blessings." How should we answer them, since we really do say, following the evangelist, "...and your reward will be great"?
Perhaps the first thing to understand is that the Lord calls us to absolute selflessness. And today's passage, in which the Lord calls us to give while receiving nothing in return, and even without hope of receiving anything, should also serve as a warning against this pseudo-Christian reliance on posthumous or some other recompense from the Lord.
It is another matter that the Lord is just. And His justice is above all. But it belongs only to Him; we have no right to judge either it or ourselves in its light. That is why the Lord says, "Vengeance is Mine, and I will repay." In these words there is not only the promise of the final triumph of good over evil, or more precisely, of evil being turned into good. In them there is also the condition of our selflessness before Him.