Believers are happy in this world and the next

Allah has promised that He will give believers who lived in accordance with the moral values of the Qur'an pleasant lives both in this world and in the Hereafter. The Almighty has revealed that this is a great salvation and happiness:

There is good news for them in the life of this world and in the Hereafter. There is no changing the words of Allah. That is the great victory! (Surah Yunus, 64)

He said: "Go down from it, all of you, as enemies to one another! But when guidance comes to you from Me, all those who follow My guidance will not go astray and will not be miserable." (Surah Ta Ha, 123)

As revealed in the verses "And there are others who say, 'Our Lord, give us good in this world, and good in the Hereafter, and safeguard us from the punishment of the Fire.' They will have a good share from what they have earned. Allah is swift at reckoning." (Surat al-Baqara, 201-02), believers who are aware of this truth pray for Allah to make them happy both in this world and the next.

With Allah's infinite justice and compassion in this world and the next, believers are happy and at ease. Allah only endows His faithful servants with such a beautiful thing because they take Him as their only God and believe without wrongly ascribing partners to Him. Our Lord has revealed in the Qur'an that so long as they abide by the moral values He has chosen for them, He will reward His faithful servants in this world and give them security after their fears:
 

Allah has promised those of you who believe and do right actions that He will make them successors in the land as He made those before them successors, and will firmly establish for them their religion with which He is pleased and give them, in place of their fear, security. They worship Me, not associating anything with Me. Any who disbelieve after that, such people are deviators. (Surat an-Nur, 55)

In another verse, Allah has revealed this happy news thus:

When those who fear Allah are asked, "What has your Lord sent down?" their reply is, "Good!" There is good in this world for those who do good, and the abode of the Hereafter is even better. How wonderful is the abode of those who guard against evil. (Surat an-Nahl, 30)