Is light immaterial? Light has no mass and can travel infinite distances. That seems completely unlike anything else in the universe. It almost seems like light is from a higher realm of existence. Moreover, light is affected by the observer, which is not the case with regular matter.

Do people not realize something super strange is going on here?

>The realm of the Good God, heaven, was filled with light. Some Cathars regarded the stars as divine sparks, or souls, or angels, in heaven.

http://www.cathar.info/cathar_beliefs.htm#other