Contrary to a literal interpretation of what some of the Biblical prophets mentioned about themselves and in referring to others, I was not born "knowing" God in my mother's womb. However, I do understand how predisposition fits here. I was predisposed. My first thought when God came up was, how can anyone know that? I wasn't dismissive of the idea. I just truly couldn't see how people, if they had the same sensory limitations I had, could know about God. I remained open and wanting to know. Jesus was a nearly completely different matter.
I came easily to believing in God teleologically and for incommunicable reasons; but Jesus, while I liked him very much and felt awful at what had been done to him, didn't click for me until I started from scratch seeking the answers as to why things were going to Hell in a hand basket again with 9/11 and more so, the obviously highly immoral invasion of Iraq.
I reread and revisited everything I thought I knew questioning everything. In the process, naturally, I considered every philosophy and religion starting from the most fundamental aspect looking for what worked from one end to the other. In the process, I determined to finally dig into Christianity, something I hadn't done enough to rule it in or out. That's when major cross-referencing of scripture per Jesus dawned on me. (My "Christian" and other education had been severely lacking, something that I complained about when I was a young child and on and off again along the way.) The rest is history, as they say.
Psalm 22 just "blew me away." Isaiah 53 did more of the same. Things just kept falling into place, and things started happening in my life that were nothing less than astounding relative to things that had happened to me before, which I had already thought were amazing.
So, I've tried to impart various things, and in the process, I've run into many variations on atheism. Atheism used to be a rather un-subdivided category for me when I was young. Let me say that I am now able to, and do, differentiate between atheists. There are atheists out mowing people down, and there are atheists dead set against that. The latter are generally more righteous than the former, assuming that the latter are consistently more generous and less sexually depraved, etc. The same applies to those who believe in spirit, gods, God, Jesus, etc., or claim to.
Heaven and Hell are continuations of what happens here. We get what we create or bring forth. This plane of existence we call the here and now is a trial — a filter. We're being sifted. It isn't inconsistent with what we call the natural processes but truly does transcend them.
Now, for me, it is both a matter of faith and knowledge. I do trust God. I do trust Jesus.
When the "time" comes, I will not be throwing atheists into the "Lake of Fire." What there will be though is a separation. There are "levels" of Heaven and Hell, and frankly, this is one of them.
You've heard of Ockham's razor. Well, I have to tell you that it's wrong. Complexity is infinite right along with simplicity. This, along with how to view many other terms, is too abstract for many at this stage. The thing is that the mind of God comprehends that infinity, and righteousness is the path.
Who God is, is not Satan or the devil or whatever term is used to describe evil. God does separate, but Satan punishes. The understanding of this is summated in the words of Jesus when he said, "Woe unto the world because of offences! for it must needs be that offences come; but woe to that man by whom the offence cometh!" That's the King James Version. Scholars and theologians haven't associated that with Satan as the ruler of this Earth in the form of worldly Presidents and others who take it upon themselves, whether "authorized" by the people or not, to mete out what those Presidents and rulers consider justice but which when viewed in the totality of Jesus's message, is actually offensive to God, which is clear in that it runs contrary to Jesus saying don't resist evil via violence.
Most "Christians" just never get this far in their thinking. Most excuse those rulers by basing the excuse on Paul's Romans 13, where he says such rulers are the instruments or ministers of God. However, they are really the instruments of Satan. This observation is very difficult for Pauline Christians. They consider Paul's writings to be on par with Jesus's words; and in many cases, they consider Paul superior to Jesus, which I say here because I've seen them quote Paul endlessly without ever even mentioning Jesus's words to the contrary. They do this because it's much easier to live by Paul's words than Jesus's, although they don't care to admit this.
Knowing where Satan fits in and doesn't is just something people have to contemplate. God is perfect, and Satan has no part in that. Christians are to look to perfection — to become one with God, which by the way, is not an ego-trip.