Every body perseveres in its state of rest, or of uniform motion in a right line, unless it is compelled to change that state by forces impressed thereon.

Corpus omne perseverare in statu suo quiescendi vel movendi uniformiter in directum, nisi quatenus a viribus impressis cogitur statum illum mutare.

More information about this quote

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Original Citation

Newton, Isaac. "Axiomata sive Leges Motus: [Axioms, or Laws of Motion]." Philosophiae Naturalis Principia Mathematica [The Mathematical Principles of Natural Philosophy], vol. 1. London: Josephi Streater, 1687, law 1.

Current Citation

Newton, Isaac. "Axioms, or the Laws of Motion." The Principia, translated by Andrew Motte. Prometheus, 1995, law 1.