Ан-Нахль 16:109

Before God, reality is what counts and not simply outward appearances. This is why liberal concessions have been made to man in Islam. If a person is truly loyal to God in his heart, but under serious compulsion and to save his own life he utters something against his faith, he will not be castigated for this by God. But those who have changed from the inside and who, under the influence of Satanic doubt or the pressure of circumstances, have willingly adopted some way other than God’s way are not pardonable. When an individual behaves faithlessly rather than as a man of faith, the reason for it is always worldliness. Looking to the salvaging of his worldly interests, he adopts the way of the unbeliever. Had he understood the value of the Hereafter, worldly interest would have appeared of so little worth to him that renouncing the Hereafter for the sake of the world would have seemed absurd. If, in the eyes of any individual, worldly benefits appear to outweigh the gains of the Hereafter, the result is necessarily that he is not able to judge matters from the point of view of the Hereafter. He sees and hears, but due to his inclination toward the world, he loses sight of the various aspects of the Hereafter. He is only able to see those aspects which are connected with worldly considerations. Those who reach this stage of neglectfulness are fated to suffer eternal loss.