How many times have we heard the old saying about the grass is always greener on the other side? My answer to this question is depends on what you are looking for. Many problems can and will pop up when we buy into this myth. Ugly characteristics begin to appear such as jealousy and asking yourself why do other people have all the 'good stuff' which leaves you feeling depressed about how little you apparently have. Your life can be taken over by wanting more and more and more. Is that what you are looking for?
This is where it gets tricky. In reality we are all less than perfect and the shiny, green grass is an illusion. So let's imagine that you made that step to the other side of the fence to be on what you believe to be the greener grass. Once you have set foot on that shiny, green grass, it will never be exactly the same again. What happens is you start off in "the honeymoon period" where you think it is better, however, as time marches on, you discover there are other issues that you were not aware of and you may find yourself wanting back on your old turf. At least there you were aware of your issues. You realized that you traded one set of issues for a new set, which may not be what you thought you wanted in the first place.
Maybe the cliche should be: "The grass is only as green as we keep it." Just as the picture above says: The grass is greener where you water it. There has to be nurturing and love of yourself and what you have. A quote from Buddha states that the way to happiness is actually quite simple; the secret is to learn to want what you have and not want what you don't have.
Thinking positively isn't about expecting the best to happen every time, but accepting that whatever happens is the best for this moment. Actually, if we all stop focusing on what we don't have, which just stresses us to our limits and remember just how blessed we are, we will be able to keep our grass green by committing to taking care of it. If you want greener grass, learn how to water it.