Every little bit, every atom inside the universe, is in a constant state of change and motion, but the universe as a whole is unchangeable, because motion or change is a relative thing; we can only think of something in… — Swami Vivekananda Copy Share Image
The law of the conservation of energy is already known, viz. that the sum of the actual and potential energies in the universe is unchangeable. — William John Macquorn Rankine Copy Share Image
