God is everything. It would be synonymous to Nature, but the word Nature is usually referring to the material part of the Creation. The material part of the creation is only a small part. The spiritual part is much larger. God is everything including Nature and all the spiritual part. God created the Creator from itself thus becoming The Creator and created our Creation. Everything in our Creation is created by God and made from God. The spiritual part of the creation is huge and our material Universe is only a tiny playground in it. It has been created to help spirits to learn and grow.
An important understanding of God comes from the idea of a fractal. A fractal is a copy of something that can make another copy. These copies are usually bigger or smaller than what created them. Fractals can create an infinite number of copies and produce complexity. Fractals are used in life - children are fractal copies of their parents. Many biological structures are developing as fractals. It helps to understand that we are fractals of God. We are its copies made out of it and carrying much of its personality and some of its powers. This is how the saying could be interpreted that God made us in His image: we are copies of God not because God has human form, but because our essence is of being creators and our substance is made out of God.
This is in part why we can heal using Reiki energy. Everyone has a direct communication line to God, we are made of it.