Overall meaning : Allah instructs His Prophet, Muhammad, may Allah bless him and grant him peace, to say to those associating partners with Him, 'Tell me, if Allah takes away your hearing and your sight and seals your hearts, rendering you utterly devoid of understanding, what god is there, other than Allah, who could restore all that to you, so you can worship him besides your Lord?’ He also directs him to see how He expounds His signs and proofs to them in various ways and forms to take heed, yet they obstinately turn away from them and deny the truth!
He further instructs His Prophet to say to them: Tell me, if Allah’s punishment overtakes you suddenly when least expected or it comes gradually and preceded by some portents, will any be destroyed by it except you due to your wrongdoing?!
The Almighty also states that He sends messengers only to give glad tidings to those who obey Him of great success and happiness and to am warn those who disobey Him of utter loss. Therefore, those who believe and do righteous deeds will have nothing whatsoever to fear in the hereafter, nor will they grieve for whatever they leave behind in the life of the world. As for those who reject His signs and proofs and disbelieve His messengers, they will be punished for their unbelief and for disobeying His commands and doing what He forbids.
Allah, Exalted be He, then orders him to inform them, after they have asked him, out of sheer stubbornness, to bring them miraculous signs so they would believe, to say to them that he does not have the treasures of Allah to bring them the miracles they are asking for, nor does he have knowledge of what is beyond the reach of human perception to inform them of it and foretell future events; nor does he claim to be an angel so they may ask him to perform extraordinary feats beyond human power and scope. He is only a messenger sent by Allah to call them to the truth. He does not speak or act except according to what Allah reveals to him. 'Are those blind to the truth,’ He directs him to ask them, 'and those who can see it and follow it alike? Will you not then reflect?’