What do you mean "there are green hills everywhere"?
This should be a word to comfort people in trouble. The implication is: Although you are not satisfied and a little degraded here, the future of "green hills everywhere" is still very beautiful.
Sometimes it means literally, advising people not to live nervously. For example, the last sentence of San Mao's Travel Notes of Madeleine said, "There are green hills everywhere in the world, so why plan the future journey?"