Yet whenever We sent any Messenger or Prophet before you, satanic people tried to confound the central aims of the Message in his very life-time. But Allah rendered null and void all the aspirations they had. And Allah makes His Messages clear in and by themselves, for Allah is All Knowing, Wise. (Satanic people then tried to alter his teachings after he passed on. Allah, then, sent another Messenger to restore the purity of His Messages (6:113). Until the Final Message was revealed and Allah Himself guaranteed its preservation.)