This volume, an updated edition of the book previously published under the title "What is Human Revolution", contains various excerpts from the writings of Master Ikeda, selected from an immense variety of sources covering many decades, including speeches, essays, lectures, and dialogues. The book explores the principles of Nichiren Daishonin's Buddhism and their practical application in daily life, with a particular focus on the concept of "human revolution", that inner transformation which is the key to achieving authentic happiness and thus contributing to the building of a peaceful and harmonious society. As Master Ikeda explains: "To accomplish your human revolution means to open your eyes and look beyond your narrow daily world, to strive to dedicate your actions to something higher, deeper, and greater."