There is a fourth quantity of some kind - a falling ball is not where it was a moment ago, and you want to be able to express that. The exact nature of this "fourth quantity" is up for debate, though.
So it's like we humans have made up time and it's acting as a mental block to truly understanding what's really going on.
Time as a man-made metaphor gives a meaning to our world in a way analogous to religion?
The above thoughts are purely my real-time ramblings, I am clueless but interested :)
We don't understand exactly how gravity works, but I'm pretty confident that being "enlightened" will not allow you to fly. Similarly, although the exact nature of time is apparently up for debate, I'm pretty sure it's not entirely man-made.
