The study of heaven and earth reveals that the entire system is marked throughout by wisdom. Here everything is as it should be. In this entire system, only human beings set themselves up against reality. This contradiction between human beings and the universe implies that it must come to an end. From this point of view, belief in the Day of Judgement is absolutely rational and logical, because nothing other than the Day of Judgement can eliminate this contradiction. Graciously overlooking or turning away from others’ improper behaviour is an essential part of the preacher’s task in spreading the word of God. That is, when the addressee of his call starts some irrelevant discussion or picks a quarrel, politely ignoring him instead of answering him is the best policy. Without adopting this principle, the propagation of the word of God cannot be effectively performed.