Qur'aanic Verse 40:4:
4 Ma yujadilu fee ayati Allahi illa allatheena kafaroo fala yaghrurka taqallubuhum fee albiladi
4. No one calls Allah’s Verses in question, but those who suppress the Truth! Hence, let not their activity among the populace deceive you.2
2. It 0ften happens that the wicked and the cruel people in this world have the upper hand. Despite their crimes against humanity, they continue apparently to enjoy life. To take an example on a macro level from history, Hitler had undoubtedly an upper hand for many years initially in World War II. He seemed invincible against his opponents all around him. But in the end he had to suffer an ignominious defeat and death. The believers have to take heart from this historical piece from our recent past. History abounds in such examples. And I have no doubt every believer has experienced in their personal lives such examples of bad persons having bad ends. But personal experiences are not necessarily definitive in character. The person experiencing or witnessing them does not always have the whole story revealed to him. The person is likely therefore to be deceived. To him or her, crime apparently goes unpunished most of the times. A believer however remains steadfast in believing that Allah Almighty is watching every minute thing everywhere and that justice is bound to be done whatever the apparent position for now. One other thing that ought to be remembered in this context is that an atheist is not likely to be punished in this world if that atheist behaves justly with all his fellow citizens here. His punishment for his disbelief in Allah is reserved for the Hereafter.
The above is an extract from Qur'aanic Studies Manzil VI.