Gravity is real...that is a fact...even though we often call it theory.
Theory is explanation...we agree.
Proof of God won't happen.
Excuse me, but where did this "god" come into the picture. I did not say anything recently in this thread about looking for evidence about "god".
I am saying that you, bobhike, don't seem to understand the scientific definitions for "proof" and "evidence". You both use it interchangeably, when in fact they don't mean the same things, in the realms of science and mathematics. .
They are not synonymous words, in the realms of both science and mathematics.
Evidence, is more physical or tangible, in which one could verify or test to be true or not. Evidences are what make a theory "factual", or not. If "not", then the theory has been "refuted".
Proof is logical or mathematical statements, like a mathematical equation: for instance, special relativity of energy and mass: E =
mc2. Proof is more symbolic representation.
This equation is proof, not evidence. Evidence, as I said it something that can be physically verified or tested.
To understand Einstein's equation, Einstein had predicted that mass and energy are related to one another; that one can test his prediction in which you can turn mass into energy, or vice versa.
To give you one example where one can test energy = mass, meaning mass can convert into energy, is the effect of nuclear explosion of the atomic bomb, at New Mexico, the first test. At the sites of Hiroshima and Nagasaki, we can see the effects it had on the survivors in the fallout, eg. ionising radiation, like gamma rays.
As to your god, you are right, there is no proof for god, because there are no equation for god. But there is also evidence for god too, which essentially mean God don't exist, and that would make God, heaven and afterlife all meaningless.