When you limit your imagination, you limit all the possibilities that want to come your way. Ultimately, you limit yourself.
You get what you think about. If your dominant thoughts are of abundance, you will see abundance in your life. Likewise, if your dominant thoughts are of limitation and lack, you will see limitation and lack in your life. If you are predominantly thinking about things you desire, your life will reflect those things. If you are predominantly thinking about things you don't want, your life experience will reflect those things. It's a simple law. Like attracts like.
Refuse to limit yourself. Open up your mind; free your imagination. What you desire is waiting for you.