A long time ago I heard a quote that went along the lines of "if we knew the location and velocity of every particle in the universe we could predict every action and reaction from now until the end of time." I'm thinking this idea may have come from Issac Newton as his third law would seem to have a connection it. My question is if any of you know where this quote/idea originated from? I'd like to use the idea in a personal project of mine but have no where to source it from. I would really appreciate any help with this.