There are three Eternal Universal Laws that we want to assist you in understanding more clearly so that you may apply them intentionally, effectively, and satisfactorily through your physical expression of life. The Law of Attraction is the first of the Laws that we will offer, for if you do not understand, and are not able to effectively apply, the Law of Attraction, then the second Law, the Science of Deliberate Creation, and the third, the Art of Allowing, cannot be utilized. You must understand and effectively utilize the first Law in order to understand and utilize the second. And you must be able to understand and utilize the second Law before you will be able to understand and utilize the third.
The first Law, the Law of Attraction, says: That which is like unto itself is drawn. While this may seem like a rather simple statement, it defines the most powerful Law of the Universe a Law that affects all things at all times. Nothing exists that is unaffected by this powerful Law.
The second Law, the Science of Deliberate Creation, says: That which I give thought to and that which I believe or expect is. In short, you get what you are thinking about, whether you want it or not. A deliberate application of thought is really what the Science of Deliberate Creation is about, for if you do not understand these Laws, and deliberately apply them, then you may very well be creating by default.
The third Law, the Art of Allowing, says: I am that which I am, and I am willing to allow all others to be that which they are. When you are willing to allow others to be as they are, even in their not allowing of you, then you will be an Allower, but it is not likely that you will reach that point until you first come to understand how it is you get what you get.
(Abraham through Esther Hicks, from the book, The Law of Attraction, page 24-25)