[Xaccers]

E=MC^2
We all know it, but do you know what the letters stand for?

E is energy
M is mass
C is the speed of light

therefore using a bit of arabic we get

C=square root (E/M)

So as speed increases, Energy and mass increases.
Something like that anyway.

Now, faster than light travel is theologically possible, although what you really do is take a short cut bye folding or warping spacetime