"If the whole universe has no meaning, we should never have found out that it has no meaning: just as, if there were no light in the universe and therefore no creatures with eyes, we should never know it was dark. Dark would be without meaning"

This quote by C.S. Lewis is a pointer that our understanding of the universe is limited by our own experiences. He is recommending that if the universe had no meaning, we would never be able to comprehend it due to the fact that we would not have the capacity to do so. He utilizes the analogy of darkness to show this point, saying that if there were no light in the universe, we would never ever understand it was dark due to the fact that we would not have the capability to perceive it. This quote is a tip that our understanding of deep space is restricted by our own experiences and that we should not assume that we can comprehend the entirety of the universe.