The earth is at best a temporary paradise, doomed to be burned up by a rogue asteroid or if it's exceedingly lucky its very own sun. Also incomprehensibly limited in the population and diversity of life it can support when compared with the universe.
How incredibly selfish of us to decide we shall be the select few that get to live on a single planet when the universe has the potential to support so many more lives.
Every second we delay, countless earth-like planets are being consumed by black holes, never to be seen again.