I'm not suggesting that antidepressants are not necessary sometimes. But they are often not sufficient. Often people need to get in contact with their depths, and to experience acceptance and understanding.
A well is something made by humans, but it penetrates into the dark reality of the earth, and miraculously fills with water, the liquid so essential for life. And that's a powerful image for what we as individuals are seeking.
The persona (Latin for "mask"), or social self that the individual shows to the world can become so artificial and entrenched that no one -- including the person wearing the mask -- knows who the individual really is.
We are all know from our experience of anxiety that we are not really in the present when gripped by an anxious state. Psychologically, anxiety pulls us into the past or the future -- and possibly both.
Jung saw that we all conceal our true nature to at least some extent , and identified it with a particular structure in the personality: the persona, which means "mask" in Latin. Mask is an deep thing in all of us.