After death

Then, I read this: "If consciousness is energy, then I suppose you don't need proof that it survives death, because proof already exists: the First Law of Thermodynamics - energy is neither created or destroyed."

But that's the thing that many people don't realize, you can't use our modern day science-laws in situations that are immeasurable. If we were to find out that our consciousness completely ceases to exist, and our consciences were energy, then the First Law of Thermodynamics would not be the same, correct?
There are many things that both religion and science can be applied to that we can't 100% prove, and if we were to, one or the other would be, for the lack of a better term (I know one, just can't think of it right now. >.>) moot.