Ahmad Sirhindi is considered one of the founding figures of the renowned Naqshbandi-Mujaddidi Sufi lineage. In this book, Sirhindi's principal teachings, originally written in Persian, are translated into English and explained in detail. Offering access to the spiritual experiences and contemplative practices of a great 16th-century Sufi, this account demonstrates why there are so few other texts that have continued to impact Muslims in the eastern Islamic world.