Because of our limited understanding, we create God in our own image so we can attempt to explain him. For example, many see Him as an older, wise, and white-bearded person in human form with a face, arms, legs, etc... just like us.

If we were triangles, he would have 3 sides.... just like us.

Have you ever noticed that in traditional US and European church depictions, Jesus is a fair haired skinny guy with blue eyes? Yet he was Jewish. As a Jew he would have darker skin, dark brown eyes, and black hair. As a carpenter who walked all over Galilee, Judea, etc, he would have been physically fit and even muscular.