Al-Naml (The Ant)
Chapter 27: Verse 4

Stumbling in Perplexity
"As for those who do not believe in the Hereafter, We have made their deeds appear attractive to them so they stumble around in perplexity."

This is the Law of Nature devised by God. Such is human psychology that when a man thinks that the results of the struggle in this life are limited to this world only, when he is not convinced that there is another Court of Law in which the whole of his life will be judged and a final verdict passed on his performance, when he is not sure that there will be another life following the present one - a life wherein he will receive the true measure of reward and punishment in consideration of his deeds - he is bound to develop a materialistic worldview. All discussion concerning the conflict between Truth and falsehood, between God's Unity and polytheism, between good and evil, and between morality and immorality appear to him as meaningless. Whatever can bring him pleasure, enjoyment, material betterment and luxuriant living, and whatever can endow him with power and authority will seem good to him, regardless of all moral and philosophical considerations. His only goal will be the pursuit of worldly advantage and this will make him wander around in every direction.

Seized with this behaviour, a man's evil deeds become attractive and charming. Making evil deeds attractive is sometimes attributed to God and sometimes to Satan. When it is attributed to God, it means, as in the above context, that whoever accepts such an attitude to life, naturally becomes infatuated with it. By contrast, when it is attributed to Satan, it means that Satan presents those people who subscribe to a materialistic worldview with an imaginary picture of a seductive heaven and continually prods him, saying: "Go ahead, you are doing well." (see for instance Surah Al-Ankabut 29: 38)

Source:
"Towards Understanding the Quran" - Abul Ala Mawdudi, Vol 7, p 137