Overall meaning : Muhammad frowned and turned away because the blind man came to him while he was busy inviting a man from the notables of Quraysh to Islam. But how could you tell, Muhammad? This blind man could have been cleansed of his sins by reason of whatever Qur’an he learns from you, or he could have been reminded and benefited from the Qur’an he hears from you?!
The man who considered himself self-sufficient because of his wealth and turned away from your guidance, you eagerly attended to him and gave him your complete attention, striving hard to preach Islam to him in the hope that he would be guided to the truth.
What harm will be done you if he does not embrace Islam and refuses to cleanse himself from unbelief and sin?! As for this blind man who came to you, striving earnestly to reach you in the hope of acquiring knowledge and listening to the truth, and he fears Allah, you paid no heed to him!
By no means should you act thus, Muhammad. The verses of the Qur’an are a reminder to all mankind. Whoever, therefore, wishes to remember it and be reminded by it should do so and act on its teachings. This Qur’an is written in honourable pages with Allah Almighty; they are highly honoured and exalted, perfectly purified from all impurity and defects, in the hands of a group of angels who are honourable, have a pleasant appearance, abundantly benevolent and are obedient to Allah.