Newton's First Law of Motion
Sir Isaac Newton (1642 - 1727) built upon the ideas of Galileo. Newton's three Laws of Motion are general, universal LAWS that explain a wide range of situations.
(Newton also invented Calculus and made great contributions in Optics, including inventing the reflecting telescope).
What is the nature of Nature, anyway? Why do objects move as they do? Was Aristotle right?
Newton's FIRST Law of Motion is that in the absence of a net force acting on an object, that object continues to do what it was doing. The "key word" or the "operative word" is continue!
"Every object continues in its state of rest, or of uniform motion in a straight line, unless it is compelled to change that state by forces impressed upon it."