International Physics Day, celebrated every year on April 24, is probably a good occasion to explore the ‘mind of God,’ for science is much more than cascading formulas or tedious lab experiments. Physics is about imagination and the endless quest to understand reality itself. Besides, not every day a physicist invites you to search for God; not in a church, but in the equations that explain everything in the universe. From the motion of planets to the mysteries of black holes and the origin of the cosmos itself, physical equations offer a definitive window into the unknown. As Einstein put it, it’s like learning to “read the mind of God".

In Michio Kaku’s book, The God Equation: The Quest for a Theory of Everything, these stimulating concepts are brought to life, inviting readers to think beyond the visible reality and imagine the possibilities of parallel universes. Kaku, a renowned theoretical physicist and science communicator, takes the reader through one of the most ambitious goals in science: unifying all known forces into a single equation. This quest, known as the “Theory of Everything," aims to bridge the gap between Einstein’s general theory of relativity, which describes the expanding universe, and quantum mechanics, which governs the microscopic world.

Kaku takes his readers on a chronological journey of the development of physics—from the ideas espoused by the ancient Greeks to the groundbreaking unification efforts in modern science. Beginning with Newtonian mechanics, he moves through Maxwell’s work on electromagnetism, Einstein’s theory of general relativity, and the rise of quantum physics. Along the way, he introduces the string theory, which can potentially offer a unified........

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