The universe seems to be pretty happy thinking of the speed of light as being the same to everybody first (Maxwell’s Laws give you the speed of light, but Maxwell’s laws are the same to everybody so the speed of light is the same to everybody), and as a speed limit second. Since you always see light moving at the same speed, then no matter how much you speed up, it will always pass you by. So catching up to it isn’t an option, and everyone will always see you traveling slower than the speed of light. This crap is often called the “vacuum energy” or “zero point energy”. The vacuum energy amounts to about 10-13J/m3, or about “the energy a baseball has falling off a table per volume of Lake Superior“.