Einstein is a piece of cake.

  It is a little-known joke that Einstein discovered the theory of relativity while taking a dump in the bathroom. If the anus opens twice as wide, the amount of feces quadruples. If you do not understand, compare elephant dung with horse manure. When an elephant takes a dump, it produces not cardboard but a whole cartload of elephant dung. The point is that it is easy. What is so difficult about it? 

  Simply put, the theory of relativity is the invariance of the speed of light. It cannot help but be invariant. This is because an electric field creates a magnetic field, and a magnetic field creates an electric field, alternating with each other. At their point of intersection, the two must coincide. We often draw a wave as a line, but in reality it is like opening and closing a fist. When the palm opens, it forms a surface, so the energy is squared. 

  It is like a pendulum: the farther it travels, the faster it returns. The isochronism of the pendulum applies. If you open your fist only a little, it moves slowly, and if you open it wide, it moves quickly, so the result is the same. The speed of light is constant because the fingers must coincide when the fist closes. If the speed of light changed, the wave would break apart. Therefore, the energy of matter is proportional to the square of the speed of light. 

  Even an elementary school student can understand this. General relativity is a little more difficult. But Zeno said it all 2500 years ago. The fact that the acceleration of a falling object cannot be distinguished from gravity means that it is impossible to determine intrinsically whether Achilles or the tortoise is faster. Action and reaction occur simultaneously. Reaction does not happen after action has passed. 

  Whether the ball strikes the wall or the wall strikes the ball, the intrinsic order is the same. A person who passes out drunk testifies that the Earth suddenly sprang up and slapped him in the face. I experienced this as a child through dizziness caused by orthostatic hypotension. Achilles and the tortoise approach each other, and their speeds are disregarded. The difference between them depends on the observer's frame of reference, but the observer must be excluded.

  If the observer intervenes, the equivalence principle does not hold. Whether Achilles takes two steps or the tortoise takes one, such details are disregarded; the two invariably converge on the center. Einstein's equivalence principle is something Zeno had already seen through 2500 years ago, and something I realized in my second year of high school and cried “Eureka!” over. This is hardly worth boasting about. 

  We must go one step further. How do we distinguish repulsion from attraction? The repulsive force used to cast a fishing rod produces acceleration, while the attractive force used to pull it in maintains a constant speed. As the bamboo bends, acceleration increases toward its tip. This is the principle by which the tip of a cracking whip easily breaks the sound barrier and creates a loud noise. 

  The speed at which a reel winds in fishing line is constant because it is powered by the force of the rotating arm. Then, is gravity ultimately repulsion or attraction? Gravity is the repulsive force of space. Space has its own inherent quantum fluctuations. The quantum fluctuations of space are the source of the gravity we know. The repulsive force of space is transformed into the attractive force of matter. Matter itself has no force.

  Gravity is the vibration of a string on a stringed instrument. Space is the instrument's string. Matter is merely a resonating body attached to that string. Whether it is a violin, a geomungo, or a gayageum, the sound comes from the string, not from the Body. What we call gravity is the mistaken belief that the resonating body produces the sound, while remaining unaware of the string. The resonating body transmits it. 

  The Body reflects sound. The Earth's attraction is reflected repulsion from space. We are mistaken. In tug-of-war, it looks as though we pull the rope with our hands, but in reality we push the ground with our feet. Tug-of-war is a contest of pushing against the ground. The actual operation of energy is the opposite of what we observe. Truth has its own inherent mechanism. It differs from superficial observation. 

  The expression “before the Big Bang” is strange; it should be viewed in terms of the logic above the Big Bang. If the Big Bang is a logic of parts, what is the logic of the whole? If the Big Bang is the logic of elements, what is the logic of the set? Quantum mechanics shows that, contrary to our fixed ideas, the atom is not an element but a set. From the standpoint of the equivalence principle, there is a symmetrical bang opposite the Big Bang. The Big Bang reflects change. 

  There must be something opposite it that reflects invariance. Change is action and reaction. Since there is no reaction without action, the Big Bang universe cannot exist without a superstructure. Under the equivalence principle, action and reaction have no sequence, so it is not a universe before the Big Bang but one opposite the Big Bang. What lies opposite the Big Bang? At the center of symmetry lies an axis.

  To be precise, it is not the opposite but a superstructure. If the Big Bang universe is a universe of force-movement-quantity, the superstructure is a universe of quality-particle-force. If the Big Bang is private ownership, the opposite is common ownership. If the Big Bang is the part, the opposite is the whole. Since the Big Bang universe is a contradictory universe of irreversible expansion, the opposite is a contradiction-free universe. The expansion of the Big Bang is a way of resolving its own contradiction.

  Increasing the size of space changes asymmetry into symmetry, so the growth in size is the increase in entropy. The opposite universe is a decrease in entropy. A decrease in entropy is superposition. Superposition negates spacetime. Spacetime arose when quantum superposition was undone by the emergence of asymmetry. It is so easy. Look closely and you can see the opposite universe. 

  To think is to look at the other side. There is a projector opposite the screen. It is not that the projector must start running before the film can be shown. The projector and the film start simultaneously. What is the difference? The engine on the opposite side is contradiction-free and cost-free. The film costs nothing, but the audience pays. Paying means that it is irreversible. 

  Film is reversible. It can be edited and revised. Dimensional change through quality, particle, force, movement, and quantity is irreversible. This is because change causes the axis to be lost. A movie is over once you watch it, but the film can be reused. We can surmise what lies opposite our world. There is an opposite universe. The difference is that this world exists in superposition.

  It is another world where contradiction-free existence, zero cost, reversibility, mechanism, and determinism hold. It could be called God, but it is not omnipotent and omniscient. Judging by how it dumped out our universe as though taking a shit, it clearly had some kind of stomach trouble. The bow is originally perfect, but when burdened with a contradiction, it fires an arrow and expels that contradiction outward; that is our universe. 

  Our universe - irreversible, contradictory, not superposed, costly. It cannot be reduced.

  Opposite universe - reversible, contradiction-free, superposed, cost-free. It can be reduced.

  The equivalence principle is the intrinsic order within a closed system elucidated by Structural Theory. If we assume that only Achilles and the tortoise exist in the universe, the intrinsic order operates around the whole composed of Achilles and the tortoise together, and that is Einstein's equivalence principle. The opposite universe should be understood not as something on the other side of our universe, but as the entire universe encompassing both sides.