When the soul remains in the third level of sleep, nightmares, night walks and air castles may occur, as the soul then lives between heaven and earth and is sensitive to thoughts and desires. Both messy and beautiful dreams can occur during this state, depending on the soul and its desires. The soul itself influences its dreams, but through thoughts and sleep disturbances, they can also be imposed by external astral entities.
Sleepwalking shows that man can also act outside of daytime consciousness.
Source: Quotations from the books of Jozef Rulof:
-If you go to sleep normally, then you pass the threshold of the third grade into the fourth. However, there is nothing more to be dreamt here, because here the organism cannot receive this inspiration, because inspiration is influence and you are disengaged.
Spiritual Gifts p.326. ) (SP.8040.8041)
-The third grade of sleep experiences disturbances and those people are, as I said, immediately awake again. Now there are material and spiritual disturbances and your doctor cannot easily determine them, because he must be able to make a supernatural diagnosis. We do not even need to follow whether he can do that, because the good man usually does not know himself. For him there is no hereafter.
However, in this state, in the third grade, you experience dreaming, the fourth is a deep sleep and here dreaming is no longer possible.
Spiritual Gifts p.393(SP.9694.9697
-If the soul continues to sleep in the third grade, then you can experience nightmares, do your sleepwalking and build your castles in the air; now you are capable of it, because the soul now lives between heaven and earth and is feeling and thinking in this. Now the ghost can come to you. Now messy and beautiful dreams are experienced, material and passionate, depending on the soul and the longings. The soul therefore has dreaming in its own hands. Because of the own thinking and the disturbances for sleep all these dreams come about and usually have no meaning. However, in that grade, you can also experience imposed dreams and they are then received by an astral personality. These disturbances during your sleep come from the mate- rial life to you during the release from the inner life, and you take them over as a personality during that restless sleep.
Spiritual Gifts p.394 (SP.9699.9705)