A lecture suggests the imparting of spiritual knowledge by an authority one who has expertise. A lecture is a way of passing on information, often specialized or newly accrued, so such an image suggests there is something we need to know. In waking life, knowledge may be passed on in an environment geared for study or research. The need for such a situation translates into the dream image of a lecture or lecture theatre. You might also like to consult the entries for Education, Learn, Teacher and School.