"cities" and "rooms." The "upper room" is the very top of the head. Jesus was in this "upper room" of His mind when Nicodemus came to see Him "by night"--meaning the ignorance of sense consciousness. It was in this "upper room" that the followers of Jesus prayed until the Holy Spirit came upon them. The superconsciousness, or Christ Mind, finds its first entrance into the natural mind through this higher brain center. By thought, speech, and deed this Christ Mind is brought into manifestation. The new birth is symbolically described in the history of Jesus.
24. "Verily I say unto you, that many prophets and righteous men desired to see the things which ye see, and saw them not; and to hear the things which ye hear, and heard them not."