God, heaven, and hell only exist metaphysically, not physically. Therefore, are only ideas.

"Physical" is something that can bee seen and touched. Certainly neither God nor heaven are "physical", at least in any sense we know. But first off how do you know that the physical actually exists at all? Edgar Allan Poe wrote: "All that we see or seem is but a dream withing a dream." While I certainly do not consider him an expert in the field I do not rule out that what he said is true. Science tells us that there is nothing "physical" about the atoms which make up everything. When magnified to its maximum the only thing that makes up a nucleus of an atom is a tiny ribbon of energy. Likewise your argument ignores the fact that certain things certainly DO exist that are far more than "ideas". I would place God in that category. But in it also are love, hate and a host of other things that transcend mere "emotional" response and can exist in reality. True love, not just the hormonal sense of attraction, undoubtedly does exist but is neither "physical" nor merely an "idea". If that is true of love why can it not be true also of God? You also overlook the possibility of the what we call "real" may not be the only thing that is "real". Scientists are in general agreement that there is the possibility of there being more dimensions than our 4. The acknowledge that there could be 11 or even more dimensions and each of those dimensions could have their own universe of which ours is only a tiny part just as a stick-man's two dimensional universe of the surface of the paper he is drawn on is a tiny part of ours. It opens the question as to whether or not God is in fact a multidimensional being. This is something which could only be caused "supernatural". Many scientists, even agnostics and atheists, have acknowledged the possibility of the "supernatural" and that an "intelligence" was behind the existence of our universe and ourselves. Atheist Stephen Hawking said: "The laws of science, as we know them at present, contain many fundamental numbers, like the size of the electric charge of the electron and the ratio of the masses of the proton and the electron ". The remarkable fact is that the values of these numbers seem to have been finely adjusted to make possible the development of life." Agnostic astrophysicist and NASA scientist Robert Jastrow said: "Astronomers now find they have painted themselves into a corner because they have proven, by their own methods, that the world began abruptly in an act of creation to which you can trace the seeds of every star, every planet, every living thing in this cosmos and on the earth. And they have found that all this happened as a product of forces they cannot hope to discover. That there are what I or anyone would call supernatural forces at work is now, I think, a scientifically proven fact." More recently, two papers published last year also seem to indicate that. The first was in March in the premier scientific journal "Icarus" which essentially said that an intelligence WAS responsible for the programming of our DNA. http://www.evolutionnews.org... (note: while the link is to a source that certainly could be called "biased", the journal where it appeared certainly is not. Here is an abstract: http://www.sciencedirect.com... ). What that says about evolution I will leave, but it is obviously profound. But the fact is that it leaves us with only two logical choices: either the programming was done by an alien life form from within our universe or that it was a supernatural intelligence. The second paper was published in May as a result of a three year study in 20 countries done by Oxford University. It found that human beings are PREdisposed to believe in God and in an afterlife. http://www.ox.ac.uk... History and Archeology have proved that every culture everywhere no matter how primitive or isoloated have sought God in their own way. This has been shown to be true even of proto-humans. The fact that this was true from the beginning of mankind indicates that it is not a "learned behavior" for survival, but rather programmed into our DNA. As a result when you link this with the previous study of the two possible choices, an alien or supernatural intelligence, the one that seems most likely is the supernatural, for why would an alien culture program us to believe in God?