Depths of any kind - a deep place in the earth, a deep well, the depths of the sea, a cellar - may represent the unconscious.
If you want to ‘get to the bottom of something in your personality that is causing problems, you must be prepared to descend into your unconscious to uncover wishes or fears that you have buried there.
[1]Vision: The depths are usually a symbol of your deepest feelings or your unconscious. Sometimes they provide insight into the deepest layers of your character. But they might also reflect profound experiences from the past. You will know which applies to you.
[2]Walking into and through the depths is part of growing and developing. Confrontation with one’s unconscious.
[3]