My problem is believing God can create matter and how God exists without being created. I just have such a hard time that I think it must be all faith I wasn't given.
A major stumbling block for many people, I think, is that far too often we try to envision God as essentially "a very powerful guy in the sky". Sometimes to the point that God is portrayed as a white-haired grandfatherly figure with a robe and sandals walking on clouds:
However within the broad Abrahamic (Judaism, Christianity, Islam) tradition God is considered radically and completely
other. God cannot be described, God cannot be defined. We consider this the ineffability of God, wholly indescribable and incomprehensible.
God is not a "super powerful being" somewhere "up there"; rather God is the Ground of Being, He is the wellspring of existence. God is therefore not something that exists, but rather
is Existence, in a way wholly beyond our experiences ("I AM that I AM").
The more one attempts to divorce themselves from the idea of God as "That Dude Up There", the easier it becomes (at least I think so) to affirm God's radical otherness, His transcendence.
A possible helpful tool for trying to expand the imagination is to consider the Ontological Argument put forward by St. Anselm of Canterbury: God is "That than which nothing greater can exist." God is, at all times, greater than what can be conceived, if you can conceive of something greater or higher than what you call "God" then what has been called "God" isn't God at all. Perhaps use this as a thinking tool.
-CryptoLutheran