Time is just a way of measuring the velocity of the motion of an object through the 3 real dimensions. In order to go into the future you would have to stop your particles for the desired amount of time (basically cryogenics). Your particles weren't present to have their effect on the future so the outcome would be slightly different than what it would have been. In order to go into the past you would have to reverse the past motion of all other particles in the universe (an exact reverse of physical law that affects everything but you). Going by that logic, I am lead to 'believe' that going into the past is literally impossible, but going into the future isn't very difficult at all. Now, if you are one that believes (I'm not saying I are or aren't) that the mind is immaterial then that still leaves the possibility for mental time travel. Any thoughts would be appreciated.