Sri Aurobindo
Letters of Sri Aurobindo
Volume IV - Part 3
It is singular that you should have accepted dreams of this kind as true or allowed them to determine or influence your conduct even in the slightest degree. These dreams are nothing but formations of the obscure lower-vital consciousness; they are made up of its desires, instincts and subconscious memories, all jumbled 
together to weave an incoherent dream-scene and dream-story and, in this case, used by some vital Desire-Force of that plane to turn you into the instrument of its movement. They have no other value for the Sadhana than to show you vividly what is there in your lower vital nature, whether awake on the surface or lying in wait in the subconscient parts. The only thing to do with them is to turn the Light upon those parts and call on the Divine Power to expunge them from the nature. It is perfectly easy for this Desire-Force or for the subliminal part of the mind to create images of anyone it pleases or to reproduce the voice and make him or her speak or act in any way convenient to it.