Luke 6:32-35

32For if ye love them who love you, what thanks have ye? for sinners also love those that love them. 33And if ye do good to them who do good to you, what thanks have ye? for sinners also do even the same. 34And if ye lend to them from whom ye hope to receive, what thanks have ye? for sinners also lend to sinners, to receive as much in return. 35But love ye your enemies, and do good, and lend, hoping for nothing again; and your reward shall be great, and ye shall be the children of the Highest: for he is kind to the unthankful and to the evil.