Book about which there is no doubt, a guidance for the God-fearing.”
“Those who believe in the unseen.”
The unseen in which one believes consists of the general matters reported by the messengers. This includes belief in Allah, His names and attributes, His angels, Paradise, and Hell. Belief in Allah, His messengers, and the Last Day thus entails belief in the unseen, for messengership itself is a matter of the unseen. In detail, this means belief in Allah, His angels, His Books, His messengers, and the Last Day, as Allah Most High mentions in His words:
“Rather, the truly righteous are those who believe in Allah, the Last Day, the angels, the Book, and the prophets.”
He also says:
“Whoever disbelieves in Allah, His angels, His Books, His messengers, and the Last Day has indeed strayed far away.”
Knowledge of the states of the heart—such as knowledge of sound and corrupt beliefs and intentions; knowledge concerning knowing Allah, loving Him, being sincere to Him, fearing Him, relying upon Him, placing hope in Him, loving and hating for His sake, being content with His judgment, and turning to Him; and knowledge of the praiseworthy and blameworthy qualities of the soul, such as generosity, modesty, humility, arrogance, self-admiration, boastfulness, and conceit, and similar fields of knowledge concerning inward matters within hearts and the like—may be called “inward knowledge,” meaning knowledge of inward matters. It is therefore the object of knowledge that is inward. As for the outward knowledge, it is manifest, expressed in speech and writing. This is attested by the Quran, the Sunnah, and the words of the early generations and their followers. Indeed, most verses of the Quran concern this