A bit of a summary of Becker on Kierkegaard:
Schizophrenia is a disease of “too much possibility” (entropy) wherein the spirit is so large in its desires, fears, and sense of the magnitude of the infinite that it can’t be contained by the body, and “not enough necessity,” i.e. grounding energy that makes one able to live functionally in the world like having a family or job.
In contrast depression is a disease of “too much necessity,” too much order and groundedness within the limitations of the body, in finitude, and lack of connection with the infinitude of possibility. Life is entirely: family, job, “the narrow horizon of daily duties.”