Book excerpt: Human revolution--the inner transformation of the individual that produces actual change in their lives--is a defining concept of Nichiren Buddhism, practiced by millions worldwide. In this series of lectures, Daisaku Ikeda breaks down twelve key aspects of human revolution and provides inspiration and guidance for people to find peace and happiness for themselves and others.“Changing our heart is not a matter of doing something that will only temporarily lift our mood or make us feel better, without changing our reality,” he writes. “A true change in our heart is more profound; genuine inner change produces actual change in our lives. Deepening our 'heart'—our life state—is the true value of our religion of human revolution. When we speak of obtaining benefit through our Buddhist practice, we are ultimately referring to our inner transformation at the deepest level.”