Assume that you are seated beside the sea and behind it are extremely high mountains. The roaring waves and the shaking of the water against the shore and with great strength, return to the sea.
We look at this scene for a moment. Then we close our eyes and see this scene in our minds with all of its greatness.
This shows that other than a body and cells of the brain, another jewel exists which can reflect any design no matter how great and at any scale. Clearly, this jewel must be something which is beyond the material world because we find nothing like it in the material world.