Question: During sleep, does the person's soul make journeys?

Sri Chinmoy: Yes. The soul makes journeys to different levels of consciousness. There are seven higher worlds and seven lower worlds. Generally the soul travels in these worlds during sleep. Almost everyone's soul is fortunate enough to have access to some of these worlds, but very few are conscious of these experiences while they are happening, or remember them after they awake.
Sri Chinmoy, AUM — Vol. 2, No. 6, 27 January 1967, Boro Park Printers -- Brooklyn, N. Y, 1967