The thought that you think, you think, which attracts to it; so you think it some more, which attracts to it; so you think it some more. In other words, when you have an expectation, you’ve got a dominant thought going on, and Law of Attraction is going to deliver that to you again, and again and again. And you say “The reason that I believe this, is because it is true.” And we say, the reason that you believe it, is because you’ve practiced the thought. All that a belief is, is a thought that you keep practicing.
What is the dominant thought you have about your self? your life? your work? your ability to succeed? Think long and answer truthfully and if the answer does not align to what you want/desire change the thought and belief. This is why affirmations are great because with practice you change your belief.