To clarify the physics here a little:<p>The constant speed is actually the speed of a massless object through spacetime. It just so happens to be that photons have no mass. Also, going at high speed wouldn&#x27;t make your life pass in slow motion <i>to you</i>. It would simply look that way to an observer who was moving vastly slower than you. The dilation in time is as a result of difference in relative velocities, rather than the speed of time changing.<p>This is also why the part about &quot;go faster than the speed of light&quot; doesn&#x27;t make sense in physics. Motion is a four dimensional vector, with three points giving a point position, and the forth giving velocity through spacetime. Thus you wouldn&#x27;t be travelling through &quot;time&quot; backwards, but through spacetime backwards.<p>Hope that helps. For more information, you may want to read up on the geometry of Minkowski spacetime.