The Lord said: “And just as you want men to do to you, you also do to them likewise. But if you love those who love you, what credit is that to you? For even sinners love those who love them. And if you do good to those who do good to you, what credit is that to you? For even sinners do the same.
And if you lend to those from whom you hope to receive back, what credit is that to you? For even sinners lend to sinners to receive as much back. But love your enemies, do good, and lend, hoping for nothing in return; and your reward will be great, and you will be sons of the Most High. For He is kind to the unthankful and evil. Therefore be merciful, just as your Father also is merciful.” (Luke 6:31-36)
St. Nikolai of Zhicha comments:
“Christ’s command that we do to others as we would that they do to us is so natural and so clearly good that it is a wonder and a shame that it has not long ago become a daily habit among men. No man desires that others do him evil: let him therefore do no evil to others. Every man desires that others do good to him: let him therefore do good to others.
The Lord continues: ‘For if ye love them which love you, what thank have ye, for sinners also love those that love them?‘ This means: if you wait for others to do good to you, and to repay this with good, you are doing no good thing. Does God wait for men to deserve the sun’s warmth, and only then command the sun to shine? Or does He first act out of His charity and love? Charity is an active virtue, not a passive one.
God has made this clear from the foundation of the world. From day to day since the world began, the Lord has, with His gracious hand, poured out rich gifts to all His creatures. Were He to wait for His creatures first to give Him something, neither the world nor a single creature in it would exist. If we love only those who love us, we are merchants engaging in barter. If we do good only to our benefactors, we are debtors paying off our debts. Charity is not a virtue that simply pays off debts, but one that constantly lends. And love is a virtue that constantly lends without looking for repayment.
If we lend to those from whom we hope for a return, what are we doing by this? We are transferring our money from one cash-box to another, for that which we lend we consider to be our own, as much as when it was in our own hands.” (Homilies, pp.193-194)