Since we can do fourth dimensional (and nth dimensional, for that matter) calculations, it would seem as if time would be a little easier to grasp if it were simply another dimension. Time can be manipulated, it can be slowed down. We can think Einstein for this gem of a discovery. Time is related to speed somehow, since the faster you are going, the less you are affected by time, thus time is not the universal "independant variable" as is so commonly accepted. For all practical purposes, yes, but this is theoretical time. Since time can be manipulated within the 3rd dimension, that also makes it seem to me that it is not, in fact, the fourth dimension. However, why does velocity have an effect on time, what does simply going faster have to do with the progression of time?
Seeing as how there is an inverse relationship between speed and time, is it possible that the two are simply opposites of each other? If so, would that explain a state suspended animation (most practically accomplished through freezing) theoretically allowing a person to advance in time unscathed, seeing as how in a state of suspended animation, a person's molecules are moving substantially slower than normal? It seems like it works both ways, which seems to support the idea that speed and time are opposite values. Of course, there must be a substantially large or small coefficient (depending on which side of the equation it's on), seeing as how you have to be going extremely fast or slow in order to have any effect on time.