Sorry, but math is the language we use to help us understand the world. We calculate the energy in a consistent way and we find that the results of that calculation are the same for different times. In other words, that computed quantity is conserved. The same works for momentum, angular momentum, charge, etc. For each, there are set ways to convert observations into calculations. And we find that the results of the calculations are consistent.<quoted text>
Now define energy. Just what is energy is? Not the math thingy, but the real thingy.
If you want to understand the universe, you need the language of mathematics.