"Did your Messengers," shall say the sentinels, "not present to you clear signs and expounded revelations demonstrating Allah's Omnipotence and Authority His Oneness and Uniqueness, His Omnipresence and Omniscience?" "Indeed they did" they, shall say then the sentinels shall say, "you may invoke Allah as long as you want; it is only that invocations voiced by those who deny Him is as vain as it attains no end.