When the Quran was revealed, it was not revealed all at once, but part by part over a period of 23 years. Those who denied the truth made this an excuse to say that this was a man-made book and not the book of God, because it would not have been difficult for God to prepare the whole book at one time. It was clarified that the Quran was not simply the work of any author. It was a divine proclamation of the Truth. One of the strategies of preaching God’s will is that it is presented to people gradually, so that it progressively takes root in society. Every objection against such activity—which is based on perfect Truth—is a false one. Whenever such an objection is raised, but then is properly clarified, the authenticity of the preacher’s call is reinforced; it is never in doubt at any stage.