Overall meaning : Who is there who could help you and defend you, unbelievers, against Allah’s punishment apart from the All-Compassionate God?! Truly, the unbelievers are in utter delusion! Who is there who could provide for you if He withholds His sustenance? Yet these unbelievers persist in their arrogance and rebellion and in their turning away from the truth!
Is the unbeliever who walks with his head hanging down, unable to see the way, and keeps falling on his face better guided or the believer who walks upright, not prone to falling down, and can see his way clearly?!