it is just a superficial level of understanding. The visible world is called the gross world. It is the least energetic of them all. There is the subtle world and also the causal world. What people call God in any form is just a means to help people understand, like an illustrated story. Since people have form and they see forms everywhere, they can understand and relate only in terms of firms so they created images of God according to their understanding and to explain to others. That was not always true though. Before they developed images of God and idols, they used to see God as light or other physical objects in nature. The reality is far far far deeper.