It could be that the purpose of your life is only to serve as a warning to others.
Not every life can be a success, just like not every vessel can be seaworthy. But there’s no shame in being one spectacular shipwreck. (Actually, there is. But we’re not going to kick you while you’re down, Edmund Fitzgerald.)
If a pretty poster and a cute saying are all it takes to motivate you, you probably have a very easy job. The kind robots will be doing soon.
When you wish upon a falling star, your dreams can come true. Unless it's really a meteorite hurtling to the Earth which will destroy all life. Then you're pretty much hosed no matter what you wish for. Unless it's death by meteor.