102 Preface قُل نَزَّلَهُ روحُ القُدُسِ مِن رَبِّكَ بِالحَقِّ لِيُثَبِّتَ الَّذينَ آمَنوا وَهُدًى وَبُشرىٰ لِلمُسلِمينَYusuf AliSay, the Holy Spirit1 has brought the revelation from thy Lord in Truth, in order to strengthen those who believe,2 and as a Guide and Glad Tidings to Muslims.The title of the Angel Gabriel, through whom the revelation came down.The People of the Book, if they had true faith, were themselves strengthened in their faith and cleared of their doubts and difficulties by the revelations brought by Al Muṣṭafā: and all whether People of the Book or not-who came within the fold of Islam, found the Qur-ān a Guide and a Gospel, i.e., a substitute for the Mosaic Law and for the Christian Gospel, which had both been corrupted.