The feeling that the grass is always greener on the other side is experienced by people who believe that others have it better than they do.
Today, people use many variations of the phrase. They may simply say, “the grass is always greener…” to bring to the attention of a friend that they are complaining about something they can fix themselves, or they may say the complete phrase.
e.g. “Susie’s never happy. Every time she gets what she wants, she forgets it and starts looking for something new. She always thinks the grass is greener on the other side.”