English translation please

إن انت اكرمت الكريم ملكته و اذا اكرمت اللئيم تمردا

Please can someone translate this in to english and explain what it means? Thanx

the translation is:
If you are generous to a good person, this person will always be grateful to you. And if you are generous to a bad person, this person will refuse to help you one day.

(alternative translation to the underlined part: will turn his/her back on you)
(generous not as in only by giving money, no by doing anything good)

the explanation is clear in the translation, it means that if u do good things to a good person this person will always be willing to help u (because this person is good) but if u do the same to a bad person he/she may refuse to do the same with u (because this person is bad)