Atheism- Materialism-Agnosticism - How do we reconcile?

I'm an ex-agnostic atheist (in no particular order), and have been studying philosophy for a bit. I'm trying to reconcile the gap between materialism, atheism, and agnosticism. <br><br>Materialism, as I understand, is the belief that everything is composed of physical matter and nothing else, that everything is physical. <br><br>Atheism is the lack of faith in God. <br><br>Agnosticism is the belief that we don't know whether or not God exists. <br><br>The gap I'm trying to reconcile is that I used to be an agnostic because I didn't know whether or not God exists. However, I've come to realize that God, as an all-knowing entity, cannot exist because everything in the universe is composed of matter. <br><br>But then I thought about this: if God cannot exist in the physical realm, then perhaps God exists beyond the physical realm, which contradicts materialism. But I still think God cannot exist because matter is all we know. <br><br>So the question I have is how do we reconcile these two opposing views? Or are they irreconcilable? Or maybe we need a new philosophy that doesn't rely on these three? <br><br>I apologize if this is a stupid question. I'm still learning philosophy and I'm not familiar with any other philosophies that could reconcile this.