Overall meaning :
Allah Almighty declares that to Him alone belongs all that the heavens and the earth contain, adding that He has commanded those to whom He has previously sent down His books and Muslims as well to fear Him and be mindful of Him by doing what He commands and avoiding what He forbids. If they disbelieve, He states, then they should bear in mind that He is absolutely independent of all His creatures and that they will in no way harm Him but they harm only themselves, for to Him belongs all that is in the heavens and the earth, and He is Self-Sufficient, Praiseworthy.
To Him alone belongs everything in the heavens and the earth, and sufficient is He as disposer of all His creatures’ affairs. If He wanted, He could remove all people altogether by destroying them if they disobey Him and bring forth others who are more obedient in their stead, for He certainly has the power to do all that.
The Almighty then exhorts people to make the attainment of eternal bliss in the life to come their greatest and ultimate objective: Whoever desires the reward of this world—such as fighting only for the sake of booty and worldly gains—should remember that with Allah are the rewards of both this life and the life to come; therefore, why restrict oneself to worldly gains when the reward of the hereafter is far better and everlasting?! Allah is All-Hearing—He hears everything people say secretly and openly, and All-Seeing—He is fully aware of all their circumstances, both hidden and apparent, and He will repay them according to their actions.