You don't read Gatsby, I said, to learn whether adultery is good or bad but to learn about how complicated issues such as adultery and fidelity and marriage are. A great novel heightens your senses and sensitivity to the complexities of life and of individuals, and prevents you from the self-righteousness that sees morality in fixed formulas about good and evil.
You are constantly told in depression that your judgment is compromised, but a part of depression is that it touches cognition. That you are having a breakdown does not mean that your life isn't a mess. If there are issues you have successfully skirted or avoided for years, they come cropping back up and stare you full in the face, and one aspect of depression is a deep knowledge that the comforting doctors who assure you that your judgment is bad are wrong. You are in touch with the real terribleness of your life. You can accept rationally that later, after the medication sets in, you will be better able to deal with the terribleness, but you will not be free of it. When you are depressed, the past and future are absorbed entirely by the present moment, as in the world of a three-year-old. You cannot remember a time when you felt better, at least not clearly; and you certainly cannot imagine a future time when you will feel better.