1. the line at which the earth’s surface and the sky appear to meet.
2.the limit of a person’s mental perception, experience, or interest.
One of the most tragic things I know about human nature is that all of us tend to put off living. We are all dreaming of some magical rose garden over the horizon instead of enjoying the roses that are blooming outside our windows today.
Dale Carnegie,American writer and lecturer 1888 – 1955.
My interpretation is that, the grass only seems greener on the other side- all you need to do is water your own.