Dreams may prove prophetic because dreams represent wishes as fulfilled and these wishes often in reality reach fulfilment. In clinical experience analysts find that a dream may offer a conflict solution that is actually achieved by the patient only weeks or months later. This may mean that the ego's function of problem-solving continues during sleep, or it may only signify that the dream makes manifest a solution reached previously in preconscious waking thought. Sleep diminishes the intensity of the conflict to be solved, providing better conditions for the functioning of the ego and permitting the attainment of a solution which the waking ego could not face. Dream material is reported and discussed in support of these observations. A bibliography of fourteen titles is given.