Overall meaning : Almighty Allah points out that whoever intercedes to help a good cause will have a share of the reward, but whoever intercedes to help an evil cause will have a share in its burden commensurate with his intention and the effort expended, stating that He has power over everything and keeps watch over all things.
When the believers are greeted with a greeting of peace, He further teaches, they should respond with a better greeting or at least return it, and declares that He takes account of all good and evil actions and will repay their doers according to them.
Then He proclaims that there is no god worthy of worship except He and that He will surely resurrect all people and gather them together on the Day of Judgement, about which there is no doubt, stressing that no one’s statement and promise is truer than His.