The One is an elastic sphere in motion. The One has a shape, mass, motion, and energy. The One is almighty and creator of the world. The One is an hydrogen atom and assembles into elements. Everything in the cosmos is created from the One by its energy. This is the hydrogen monism of metaphysics. This book also contains self-selected works of Hiroyuki Aizawa from 2014 to 2016, which include "Molecular Mechanics of the Ideal Gas," "Light," "The Galaxy," "The Sun" and "Life" for further understanding of hydrogen monism.