The Early Sessions, Book 4

"The ego is indeed equipped to handle physical reality. Its purpose is the manipulation of the personality within the physical universe. Its most effective method of procedure however is to form the problem concisely, and then feed it to the subconscious before the personality enters the dreaming state. This requires on the ego’s part an excellent ability to perceive correctly the elements of the physical situation, to express it in terms that the subconscious can understand, and to deliver the message properly. The subconscious will then break the physical data given to it down into its psychic components, translate it into symbols; and the inner self, at the request of the subconscious, will then focus all of the energies at its command to deliver the most acceptable solution, taking the entire needs of the whole self into consideration."

Session 183, Page 227