third law is equal and opposite reaction . . . the first law is inertia of mass. From everything I can remember reading, people often talk about the mystery of inertia in bodies . . . well, i finally got around to thinking about this stuff(admittedly), and it seems to me that the first law is a derivable from the third. If you try to pull a set of particles all reacting to your pull(and maybe some initial pushing of contacting a body of particles), then, all those particles will push away(and do some back and forth reactions amongst themselves) . . . so, the first law is explainable by the third. I've never heard anybody say this, so, sorry is somebody has!