This is the guidance of Allah: He giveth that guidance to whom He pleaseth, of His worshippers. If they were to join other gods with Him, all that they did would be vain for them. Al-An'am 6:88 ⧉
Tafsir:
The task of giving the call of Truth is undertaken only by those people who have become so selfless and so immersed in this work that they have no material expectations whatsoever of their addressees. Then the preacher cannot stage protests or run a campaign of demands pitted against the very person or group of persons to whom he is conveying the message of the Hereafter. Such an action on the part of the messenger of Truth would risk his exhortations being treated as ridiculous in the eyes of his addressees, and in society at large his call could never thus attain the status of a serious effort to convey the Word of God.