A mediator is a person who stands between two people, in this case between God and men, between God and the creation.
حلوة قوىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىى كالعادة :)