We forget that we threw the boomerang in the first place and we don't see that that created our experience. These signals get sent out into the ether and attract like signals. These experiences which return to us are nothing more than a reflection of our own beliefs. So what you are being, you are creating. Your beliefs manifest your reality in physical form.
Faith is the most important element involved in the recipe for creation.
Take a look at everything you see in your surroundings. It was once a thought in someone's mind, invested with enough faith and time to create it in their reality. Many people have incredible ideas but lack the faith to manifest them into their lives. You must supply enough attention to your dreams to make them real. Take a look at some of the world's greatest creators, Thomas Edison, Jesus Christ, Copernicus, The Buddha, Moses, Albert Einstein, Harriet Tubman.