I don't exactly remember when, but I do know it was a long time ago, I first heard an expression that says "the grass is always greener on the other side of the fence." Now, I don't know if the person who coined this phrase was a farmer, or just really wanted to be a cow, or what. I don't know why grass was used here for the metaphor. But the gist of the statement is that things are always better somewhere else, than where you are. This can apply to a relationship, a job, a church, a home, or really just about anything.
But the truth of the matter is that wherever you go, things will always be better somewhere else. Sometimes we are presented with opportunities that just seem like they are so much better than what we already have. But, when we examine those things closely and then look closely at what we have, what we often find is that we are much better where we are. Our current situations seem to look bleek because they are comfortable and normal--sometimes too much so. But when things come up that offer a change of scenery, we can examine what we have for what it truly is...and many times, that's not bad at all. In I Timothy 6 Paul writes to Timothy concerning a group of false teachers who were teaching that godly actions were a way to bring about financial gain. Paul writes that "godliness with contentment is great gain." When we have contentment, we quit worrying about what's on the other side of the fence, and can see what we have for what it truly is.