Not Understand !!

He does propound to you a similitude from your own (experience): do ye have partners among those whom your right hands possess, to share as equals in the wealth We have bestowed on you? Do ye fear them as ye fear each other? Thus do we explain the Signs in detail to a people that understand. {28} Nay, the wrong-doers (merely) follow their own lusts, being devoid of knowledge. But who will guide those whom Allah leaves astray? To them there will be no helpers. {29} So set thou thy face steadily and truly to the Faith: (establish) Allah's handiwork according to the pattern on which He has made mankind: no change (let there be) in the work (wrought) by Allah: that is the standard Religion: but most among mankind understand not. {30} Turn ye back in repentance to Him, and fear Him: establish regular prayers, and be not ye among those who join gods with Allah,- {31}

(Sura Al-Room Verse 28 To 31)