Time isn’t simply just another dimension
&gt; However — and this is the key point — the faster you move through space, the slower you move through time. The other dimensions are not like this at all: your motion through the x dimension in space, for example, is completely independent of your motion through the y and z dimensions.<p>Not the clearest way to think about this. The speed of light isn&#x27;t the speed limit, it&#x27;s the <i>only</i> speed. If you&#x27;re not moving in space, you&#x27;re moving through time at c.<p>So for the above example, something moving in the x-direction at c, can&#x27;t also be moving in the y or z components--spacial directions are also not independent with each other.