Here’s an interesting quote from Neville Goddard:

“The subconscious never fails to express that which has been impressed upon it. The moment it receives an impression it begins to work out the ways of its expression. It accepts the feeling impressed upon it, your feeling, as a fact existing within itself and immediately sets about to produce in the outer or objective world the exact likeness of that feeling. The subconscious never alters the accepted beliefs of man. It outpictures them to the last detail whether or not they are beneficial.

To impress the subconscious with the desirable state you must assume the feeling that would be yours had you already realized your wish. In defining your objective you must be concerned only with the objective itself. The manner of expression or the difficulties involved are not to be considered by you. To think feelingly on any state impresses it on the subconscious. Therefore, if you dwell on difficulties, barriers or delay, the subconscious, by its very non-selective nature, accepts the feeling of difficulties and obstacles as your request and proceeds to produce them in your outer world.

The subconscious is the womb of creation. It receives the idea unto itself through the feelings of man. It never changes the idea received, but always gives it form. Hence the subconscious outpictures the idea in the image and likeness of the feeling received. To feel a state as hopeless or impossible is to impress the subconscious with the idea of failure.

Although the subconscious faithfully serves man it must not be inferred that the relation is that of a servant to a master as was anciently conceived. The ancient prophets called it the slave and servant of man. The subconscious does serve man and faithfully gives form to his feelings. However, the subconscious has a distinct distaste for compulsion and responds to persuasion rather than to command; consequently, it resembles the beloved wife more than the servant.”