"Let's pray that the human race never escapes from Earth to spread its iniquity elsewhere"

This quote by C. S. Lewis is a plea for mankind to remain on Earth and not spread its negative influence to other worlds. Lewis is suggesting that the mankind has actually done enough damage on Earth and that it must not be allowed to spread its iniquity elsewhere. He is warning that if mankind were to escape from Earth, it would bring its negative characteristics with it, such as greed, selfishness, and destruction. He is asking us to pray that mankind will stay on Earth and work to enhance its own society, instead of spreading its negative impact to other worlds. By doing this, we can make sure that the mankind will not trigger anymore harm than it already has.