In this book we follow the great course of the concept of action in physics that contributed to the dissolution of prejudices about the world, based on the power of mathematical technique and the human power of creation. Action appears first in the world of matter, where in combination with Euler's mathematics, gave us a great beginning of the principle of least action and transformed Newton's physics into Lagrange analytical mechanics. Then it moved to the continuum of radiation where the prophet Planck gave us the atom of action in nature, analogous to the atom of matter. This atom led us to quantum physics and we will eventually apply it to a new idea that of the discontinuity of space and time, which is my goal, in the hope that any interested person can enjoy it.. We will now interpret the paradoxes of quantum mechanics, from the principle of uncertainty relations until matter waves, simply abolishing the eternity in continuity of space and time.