Directions: The passage given below is followed by four alternative summaries. Choose the option that best captures the essence of the passage. Key in the number of the option you choose as your answer.
The indisputable analogy between dreams and insanity extending as it does down to their characteristic details, is one of the most powerful props of the medical theory of dream-life, which regards dreaming as a useless and disturbing process and as the expression of a reduced activity of the mind. Nevertheless, it is not to be expected that we shall find the ultimate explanation of dreams in the direction of mental disorders; for the unsatisfactory state of our knowledge of the origin of these latter conditions is generally recognised. It is quite likely on the contrary; that a modification of our attitude will at the same time affect our views upon the internal mechanism of mental disorders and that we shall be working towards an explanation of the psychoses while we are endeavouring to throw some light on the mystery of dreams.