When cleaning out some papers from a desk, my husband found a one sheet document with many laws listed on it describing what each of them are. He can't remember where or who he received it from but it sounds like a Brian Tracy teaching.
One of those listed is the Law of Expectations. It says 'Whatever you expect with confidence will have a tendency to materialize in your life'. If you think about it this is so true both from a negative and positive viewpoint.
There are those that have an upbeat, optimistic attitude about life in general and typically have written goals they want to achieve, and through their hard work, belief, visualization and affirmations their goals materialize. They expect them to come true because they believe it with all of their heart and soul and do what it takes to get there.
Then there are those that complain about everything; their job, their kids, their spouse, their boss, their coworkers, their cats, dogs, weather - just life in general. You know the type, "Woe is me because nothing ever goes my way". In other words, the "Debbie Downers' or the "Nick Negatives". And guess what? Most of the time things in their lives remain pretty much the same which they too complain about. Why? Because that's what they expect and therefore that's what they get.