Birds fly overhead
Light. We are the light. We are matter and the reason we see light is not as straight forward as it seems. As the clouds glow because of water as water glows with their light and the light of sunshine, this is all a chemical reaction. If you could take light down to a human level of the chemical processes of the body, the reaction of the body to breakdown food and turn food into energy creates light and our bodies to glow like stars at night. We see each other in the dark without the light on but would notice the presence of another person more than see them. If we gather our thoughts and then take them skyward, we know of the presence of clouds because of shadows on the ground without looking at them or the sun is in the sky because we have a shadow on the ground. So, then you could talk about the reverse of light and get to matter, matter is our light but the reverse of light and as we exist as a substance so does matter. Light is in effect a chemical reaction.
We float off with the clouds and god is our light. Sunny days with wind and racing clouds make the landscape appear surreal. Are we dreaming or did I see the sky today? Leaves, birds and humans alike do not seem to notice the changing light. Birds fly overhead.