(I know this seems long, half of it is quoting though)
It is something which exists eternally - without beginning and without end. It is not difficult to understand.
God is not, because there is no evidence of him and his existence goes against logical belief. Infinity exists, there is evidence of it (Well, theoretical evidence - if something exists forever, then you would need to have a way to measure "forever" to be able to prove it is, in fact, infinite. However, there is good reason to believe in infinity, because it is the only logical conclusion - whereas God and by extension Intelligent design is not).
You cannot argue for infinity and then argue that nothing else but that one thing you believe in is infinite, and then only so that it could create finite things. The very laws of conservation of matter (and energy) would agree that all matter has always existed, and all energy has always existed - to deny this is to deny two of the most basic and fundamental laws of science, it would be saying that matter and energy could be both created and destroyed. (Yes, yes, I know that they can be to some small degree - or at least, we can partly turn matter into energy, or even entirely turn it into energy with antimatter, however the total amount of energy and matter in the universe remains constant, it cannot be created or destroyed).
It is not that I do not want a god to exist and that is why I am denying its existence (in most religions, this would be fantastic for me - an afterlife is preferable to the cessation of my consciousness), I am denying its existence because I am not willing to deny every single rational part of my being telling me that to believe in it would be nonsense, to deny reason and logic in favor of belief in something that should not and does not exist.
It is not limited at all. Just because these scientists believe that at one point there will be a big crunch does not mean that there will, in fact, be a big crunch. It is not even entirely accepted, merely a theory - one scenario of many, and in addition, you are applying too much stock to belief. Because some believe something means nothing, belief can be flawed (as I have said) and belief can be incorrect. If you decide that because they believe in something, it could be correct, then you are applying the same circular reasoning you've been pushing since the beginning.
And I have explained the logic (if I haven't explain the logic, then please, tell me what these are?
"I continue to tell you that this is illogical, if we assumed that for anything to exist, everything would need to be created, then even the intelligent designer you claim exists would have had to be created, which would lead into an infinite cycle of creation that would eventually, again, reach that one, inevitable stage - at one point there was nothing, there was oblivion, an eternal void indescribable due to it being impossible to know what unexistence is like - and then there was something.
Logic demands therefore that for existence to exist, creation is unnecessary. Once you have accepted that creation is unnecessary, you can then cut out the Intelligent designer - because an intelligent designer was never needed to create anything in the first place"
"I've explained before and I'll say it again, logically, something need not be created to exist. Even with a god (and I explicitly mentioned an intelligent designer) this is necessary. Everything always existed, because there is no other logical possibility. If you simply claim that "Hey, no, what i'm saying? Logic doesn't apply to it" then again you forfeit the right to truly call your argument an argument (because it's just you making wild claims and saying that logic means nothing when it's used against you)."
"I have explained the logic. You can't simply choose when logic applies and it does not. The idea that everything has to be created is violated by existence itself, because if everything had to be created, so would the creator. If you argue that the creator is infinite, then you argue that creation is unnecessary because infinity exists. If infinity exists, the creator is unnecessary because, since it has been established that something does not need to be created to exist, why would there be a creator? It is an unnecessary, illogical addition to the plan - the idea that this one thing is infinite, but nothing else is.")
I have continuously explained my logic, and you continue to deny even seeing it, apparently. Counter what I am saying, don't ask me to repeat it.
You are obviously and directly choosing that human logic that human logic does not apply to god! You literally said at one point here that he is beyond human logic, how can you possibly disagree with yourself?!
There is nothing "before logic"; logic is reasoning - it was not created created and does not need to be created, nor is it tangible and thus limited to what it can be used on. It's the same thing as saying "your logic", it is inherently false because there is only one logic and it is not "made" by anything, it is assessment of fact in purely calculated terms which will reach a conclusion.
Gerald Shroeder tries to bind science and religion together in an attempt to keep his beliefs from dying. Science and religion cannot be married together because both directly contradict each other; and to those who say that a god made science I say that they make more and more claims that can never be proven, after their original ones are already refuted or destroyed, after they are proven wrong time and time again. They have no solid position, they have no argument, they have no logic or reasoning behind their work, they have god and they tell everyone that it is the answer, regardless of the question being asked.
Their degrees do not give their work validity, it doesn't matter if you've graduated from MIT or Yale, the education is mostly the same - the only thing you buy when you go to these colleges is the reputation that comes with them (And reputation is everything - intelligence and skill be damned).