Quran on Doubt

Most of them follow not but conjecture. Assuredly conjecture can by no means take the place of truth. Lo! Allah is Aware of what they do.

Nay, but they denied that, the knowledge whereof they could not compass, and whereof the interpretation (in events) hath not yet come unto them. Even so did those before them deny. Then see what was the consequence for the wrong-doers!

And if We delay for them the doom until a reckoned time, they will surely say: What withholdeth it? Verily on the day when it cometh unto them, it cannot be averted from them, and that which they derided will surround them.

And say: Truth hath come and falsehood hath vanished away. Lo! falsehood is ever bound to vanish.

Murmuring among themselves: Ye have tarried but ten (days).

He is only a man in whom is a madness, so watch him for a while.

And those who disbelieve say of those who believe: If it had been (any) good, they would not have been before us in attaining it. And since they will not be guided by it, they say: This is an ancient lie;

Nay, but they have denied the truth when it came unto them, therefor they are now in troubled case.

Thinketh man that he is to be left aimless?