Overall meaning : Allah, Glorified and Exalted be He, informs the believers that if any of them renounces his faith, which is the true religion, and falls into unbelief, he will harm none but himself and will not harm Allah in the least. He will replace those who apostate, Allah states, with others better than them, whom He loves and who love Him, who are merciful and humble towards the faithful and stern towards the unbelievers, who fight for His cause to make His religion reign supreme and who, in their keenness on doing what is pleasing to Him, do not fear anyone’s censure. Then He points out that it is by His grace that they possess the aforementioned excellent qualities, that He bestows such grace and bounty on whomever He pleases and that He is All-Bounteous, All Knowing, who knows full well who deserves such favours.
After forbidding the faithful from supporting those from whom they must dissociate themselves, the Almighty defines for them the group to whom they must show loyalty and support. He says:  Your only supporters are Allah, whose assistance you seek in times of adversity, and His Messenger, through whom He has brought you out of unbelief into faith, and the believers who duly perform the prescribed prayers, pay zakat to those entitled to it and fully submit themselves to Allah. Then He explains that those who take Him, His Messenger and the believers as supporters—by demonstrating true obedience to Allah, following His Messenger’s example and standing by the believers—do constitute Allah’s party, which will certainly triumph.