Yes the 4th being time. But you can't draw that onto paper. If I draw the effect of gravity that a planet has on the fabric of space I would come up with a much larger sphere of space/time around the planet that is distorted/warped. But if gravity pulls you to one point in 3d space then what I...
I've tried to imagine and draw the effect of a large object would have on space time in 3d but it just doesn't seem right. Would I be right to assume that maybe spacetime has more than 3 dimensions?