Suffering explains too little. Van Gogh's enduring power owes more to deliberate decisions about color than the familiar story of a tormented genius allows, as his letters document sustained attention to pigments, contrasts, and other painters' methods. Brilliance required patient work. Behind the apparent urgency of his pictures stood an artist who read, compared, practiced, and revised.
The letters resist mythology. Writing to his brother Theo, Van Gogh discussed complementary colors and the work of Eugene Delacroix, treating painting as a discipline whose effects could be studied rather than merely felt. Contrast became expressive machinery. In The Night Cafe, red and green do not simply record a room; Van Gogh explained that he wanted those colors to convey destructive human passions. Emotion acquired a method. His departures from observed color were often purposeful choices, which makes the paintings less like involuntary disclosures and more like arguments conducted through pigment.
Illness was no apprenticeship. Van Gogh's correspondence also describes attacks that interrupted his ability to work, complicating any claim that distress reliably supplied the energy or insight behind his paintings. The distinction changes interpretation. It does not require denying that suffering entered his subjects or emotional life; it requires separating what he endured from the technical knowledge he continued to build. Causation remains harder to prove. No letter can settle what his art would have become without illness, but the surviving record gives study a presence that romantic accounts too often erase. The painted room burns; the painter has chosen the red.