I may be wrong, and maybe some physicscats can set me straight, but we can only manipulate time relatively, in how it is experienced from a point perspective by means of gravity(and probably speed or something). To me, that doesn't mean we are manipulating time, just your perspective of it.
Also, infinity seems lazy to me as an explanation of anything outside of math itself.
Again, I think we are too small, or it's too big, to understand it at this point.