105 Preface وَكَذٰلِكَ نُصَرِّفُ الآياتِ وَلِيَقولوا دَرَستَ وَلِنُبَيِّنَهُ لِقَومٍ يَعلَمونَYusuf AliThus do we explain the signs by various (symbols):1 that they may say, “Thou hast taught (us) diligently,” and that We may make the matter clear to those who know.2Cf. 6:65 and n. 889.The teaching in the Qur-ān explains things by various symbols, parables, narratives, and appeals to nature. Each time, a new phase of the question is presented to our minds. This is what a diligent and earnest teacher would do, such as was Muḥammad Muṣṭafā. Those who were in search of knowledge and had thus acquired some knowledge of spiritual things were greatly helped to understand more clearly the things of which, before the varied explanations, they had only one-sided knowledge.