The Sustaining Utterance is a collection of Rabbi Adin Even-Israel Steinsaltz's oral teachings of the second book of the Tanya, Shaar HaYichud VeHaEmunah (Gate to Unity and Faith), also known as Chinuch Katan (Education of the Child), written by Rabbi Schneur Zalman of Liadi, the 18th-century founder of the Chabad movement. In this book, Rabbi Steinsaltz addresses profound questions relating to our knowledge of God and the world, and brings new depth and understanding to this Chasidic work.