In a general sense, sleeping in the Bible represents a state of obscurity about spiritual matters, a state in which you are not recognizing things that are spiritually true and not seeking what is spiritually good. In particular -- especially when someone is in a "deep sleep" -- it represents a state in which we believe we think, feel and do everything from ourselves, without acknowledging that all life comes from the Lord.

(Odkazy: Arcana Coelestia 147, 150, 3715, 5210)

147. Verse 21 And Jehovah God caused a deep sleep to fall upon the man, and he fell asleep; and He took one of his ribs, and He closed up the flesh in its place.

'A rib', which is a breast bone, is used to mean man's proprium when it contains very little life, a proprium indeed that he cherishes. 'The flesh in place of the rib' is used to mean the proprium when it does contain some life. 'A deep sleep' is used to mean that state into which he was brought so that he might seem to himself to have a proprium. This state resembles sleep because a person in that state is conscious only of living, thinking, speaking, and acting from himself. But when he starts to realize that this is false, he is aroused from sleep so to speak and wakes up.