Your dominant thoughts always match your manifestations, and so, once you understand the absolute correlations between your thoughts, how you feel, and what is manifesting in your experience, you can then accurately predict everything that will come into your life.
It is nice when you are aware of your thoughts and therefore aware of what you are creating before it manifests, but it is also of value, after something has manifested, to then acknowledge the thoughts that led up to it. In other words, you can make the conscious association between your thoughts, feelings, and manifestations before the manifestation occurs or after the manifestation occurs. Both are helpful. When you dream about something, it is always a match to the thoughts that you have been thinking. And so, since each of your dreams is, in fact, your creation, it is not possible for your dream about anything that you have not created through your thoughts. The fact that it has now manifested in your dream state means that you have give it a significant amount of thought.
The essence of the way you feel about the things you think about most will eventually manifest in your real life experiences, but it takes even less time and attention for it to manifest if your dream state. And for that reason, your dreams can be of immense value in healing you understand what you are in the process of creating in your awake state. If you are in the process of creating something that you do not want, it would be easier to change the direction of your thoughts before if manifests than wanting to change your thoughts after it manifests.
The process of evaluating dreams is as follows : As you go to bed, consciously acknowledge that your dreams accurately reflect your thoughts. Say to yourself, It is my intention to rest well and to awaken refreshed. And if there is anything important for me to recall from my dream state, I will recall it when I awaken. Then as you awaken, before you get up, lie there for a few minutes and ask yourself, Do I remember anything from my dream state? Although you may be able to recall different aspects of your dream state throughout the day, usually the best chance of recalling your dreams is when you first awaken. And as your begin to recall one of your dreams, relax and try to remember how you felt during the dream sequence, for recalling your emotions will give you even more important information than recalling the details of your dream.
Reference : Ask and It Is Given. Esther and Jerry Hicks.