Janet held that exhaustion causes mental disorder, not the reverse.

Evidence

For Janet, neurosis is a functional illness, not a biological one, and it is located in the upper spheres of these functions, “in their adaptation to current circumstances.” According to him, “Most neuropaths are depressed, exhausted, and have been since the start of their illness: their mental disorders find their origins in this very depression.” — Alain Ehrenberg, The Weariness of the Self, 236

Categorization

• XREF: connects to: Janet modeled the psyche on fixed energetic reserves. — Alain Ehrenberg, The Weariness of the Self: Diagnosing…, 239