Phizzy, am not an atheist, but I venture to say that Mathematics is a human language, used by, but untouched by the interference reported for the builders in Babel. and while we are at it, one of the most useful tool in that laguage is the EUATION and it's manipulation.
An balancing of two different expression on either side of the '=' sign. like on a balance weight scale.
To arrive at the "zero sum", 'ultimate free lunch" universe, a balance is suggested between Energy and matter/gravity. or similar opposites, like matter/antimatter in the process near the 'Big Bang' event. however,
having two equal weight or value on both sides of the equation or pivot point, does not mean that the TOTAL value present is zero, no, rather the TOTAL is twice the weight or value on each side. That is so, even if the two touching would annihilate each other. Good for us there was not a perfect balance of Matter & Antimatter in the beginning. so
To have balanced viw, there is a lot of Energy, matter present in the Universe now, that was not in that form and that place before.
WELL, like all Languages that Humans use, Math is a thing of beauty,
when spoken WELL.