Time appears to pass more slowly for faster-moving bodies. In other words the faster you travel, the slower time will move for you. When you reach the speed of light time stops. If you travel faster than the speed of light it is assumed you can go back in time. All these natural explanations of time seems harmonically sound..........until you get to how you can go into the future. Why does time speed up as a approach the speed of light? Doesn't the violate the "Time appears to pass more slowly for faster-moving bodies" principle. Time going slower as you go faster seems to logically make more sense. Time all of a sudden speeding up instead of slowing down as you approach the speed of light (as will as some other aspects of time dilation) do not logically make much sense. Instead, it would be more logical to go forward in time with negative speed (t). However we all know that you cannot go at a negative speed, and in this alternative way you cannot go forward in time. This alternative law of nature is similar to the fact that you can't go over the speed of light and therefore you cannot go back in time.