Among human beings there are some persons who say that they believe in Allah and the hereafter but they do not mean it, therefore they cannot be counted with the believers. These hypocrites, who say and do things which they do not mean think that they are deceiving Allah(SWT) and the believers but in fact they are deceiving themselves by their hypocrisy as they are unconsciously preparing themselves for hell. In their hearts is the disease of hypocrisy (Nifaaq Chapter 9: Verse 77) compared to the healthy hearts of the believers which contain belief (imaan) (Chapter 49: Verse 7) Allah (SWT) has therefore further increased this disease of theirs and because they deny His message they will have to face a painful punishment.