Explanation of verse 2:186
188. Even though people can neither see God nor subject Him to any other form of sense perception this should not make them feel that God is remote from them. On the contrary, He is so close to each and every person that whenever any person so wishes he can communicate with his Lord. So much so that God hears and responds even to the prayers which remain within the innermost recesses of the heart.
People exhaust themselves by approaching false and powerless beings whom they foolishly fancy to be their deities but who have neither the power to hear nor to grant their prayers. But God, the omnipotent Lord and the absolute Master of this vast universe, Who wields all power and authority, is so close to human beings that they can always approach Him without the intercession of any intermediaries, and can put to Him their prayers and requests.
189. This announcement of God’s closeness to man may open his eyes to the Truth, may turn him to the right way wherein lies his success and well-being.