“But I say to you that listen, Love your enemies, do good to those who hate you, bless those who curse you, pray for those who abuse you. If anyone strikes you on the cheek, offer the other also; and from anyone who takes away your coat do not withhold even your shirt. Give to everyone who begs from you; and if anyone takes away your goods, do not ask for them again. Do to others as you would have them do to you. “If you love those who love you, what credit is that to you? For even sinners love those who love them. If you do good to those who do good to you, what credit is that to you? For even sinners do the same. If you lend to those from whom you hope to receive, what credit is that to you? Even sinners lend to sinners, to receive as much again. But love your enemies, do good, and lend, expecting nothing in return. Your reward will be great, and you will be children of the Most High; for he is kind to the ungrateful and the wicked. Be merciful, just as your Father is merciful. (Luke 6:27-36, NRSV)
This has to be one of the hardest things to following Jesus.
Because this is what is supposed to set us as Christians apart from the rest of the world. Because as Jesus said everyone loves those who love them and lend to those who will repay and forgive those who ask.
But as Christians we have to love those who hate us, and forgive everyone and lend to all without expecting anything in return.
Because that is what God did for us.
Grace and mercy are gifts, freely given to us, so that we can give them to the world.