one of the fundamental characteristics of unbelievers is their arrogance. it is that which has led them to refuse to obey the messengers of allah, and to resort to excuses in order not to do so. one such excuse was that they would only obey these messengers if they were more than human. yet, the prophet (saas) reminded his people that he was human, a mere servant of allah, and that all other such expectations were groundless, but that they should turn to allah. allah gave the prophet (saas) the following commands in the qur'an:

say: "i am only a human being like yourselves. it is revealed to me that your god is one god. so let him who hopes to meet his lord act rightly and not associate anyone in the worship of his lord." (surat al-kahf: 110)

say: "if there had been angels on the earth going about in peace, we would have sent down to them an angel from heaven as messenger." say: "allah is a sufficient witness between me and you. he is certainly aware of and sees his servants." (surat al-isra': 95-96)

the prophet (saas) told his people that he was also commanded to be one of the muslims and to obey allah, and that he was responsible for warning the unbelievers, but that he could not be held responsible for their choices. the verses in question read:

"i have simply been ordered to worship the lord of this land which he has declared sacred-everything belongs to him-and i have been ordered to be one of the muslims and to recite the qur'an." whoever is guided is only guided to his own good; if someone is misguided just say, "i am only a warner." say: "praise be to allah. he will show you his signs and you will recognise them. your lord is not unaware of what you do." (surat an-naml: 91-93)

if something good happens to you, it galls them. if something bad strikes you, they rejoice at it. but if you are steadfast and do your duty, their scheming will not harm you in any way. allah encompasses what they do.
(surah al imran: 120)

when a sign comes to them, they say, we will not believe until we have been given the same as the messengers of allah were given.' allah knows best where to place his message. debasement in the sight of allah and a severe punishment will strike those who did wrong for the plots that they concocted. (surat al-an'am:124)