قَدْ جَاءَكُم بَصَائِرُ مِن رَّبِّكُمْ ۖ فَمَنْ أَبْصَرَ فَلِنَفْسِهِ ۖ وَمَنْ عَمِيَ فَعَلَيْهَا ۚ وَمَا أَنَا عَلَيْكُم بِحَفِيظٍ (104)
(6:104) The lights of clear perception have now come to you from your Lord. Then, he who chooses to see clearly, does so for his own good; and he who chooses to remain blind, does so to his own harm. I am not your keeper. *69
*69). Even though this statement is from God, it is expressed through the mouth of the Prophet (peace be on him). We observe that in the Qur'an the speaker frequently changes - sometimes it is God Who is speaking, sometimes it is the angel who carries the revelation, and sometimes a group of angels; on some occasions it is the Prophet (peace be on him) who is speaking, while on others it is the men of faith. Likewise, those addressed by the Qur'an also change - sometimes it is the Prophet (peace be' on him); sometimes it is the men of faith; sometimes it is the People of the Book; sometimes it is the unbelievers and the polytheists; sometimes it is the Quraysh; sometimes it is the Arabs; and sometimes, mankind as a whole. Regardless of these changes, however, the content of the message always remains the same - it consists of God's guidance to mankind.
The statement 'I am not your keeper' signifies that the task of the Prophet is confined to carrying the light of true guidance to others, it is then up to them either to use it to perceive Reality for themselves or to keep their eyes closed. The Prophet (peace he on him) is not asked to compel those who deliberately kept their eyes shut to open them, forcing them to see what they did not wish to see.