This book offers readers a rare appreciation of some of Sufism's deepest understandings about both knowledge of the Real, and those to whom it is granted either through tasting or revelation. While some of the themes here are introduced in earlier of Sidi's books, this text offers an expansion of these concepts before extending brand new teachings not found elsewhere. As one particularly well-read student of Sufism has said, “I haven't read anything like what’s in this book – it’s such a deep discussion of the hidden knowledge!” Yet, while many taste, few grasp completely all of what is offered. The standard of linking Sufi teachings to the Qur'an and to Hadith enables the development of the reader’s understanding of the “interior” of Islam's holiest books.