HaRav Avraham Yitzchak HaKohen Kook wrote these inspiring words in Oros HaTeshuvah, a work in which he delivers the message that teshuvah is not a somber process of self-deprivation but a joyful journey back to Hashem and to the core of who we are. 
Includes the original Hebrew text of Oros HaTeshuvah, a new translation into English by Yaacov Dovid Shulman, and commentary in English from Rabbi Moshe Weinberger.