Theodor Fechner — the 19th-century physicist who founded psychophysics — spent a decade bedridden after staring at the sun during optical experiments, partially blind and in chronic pain. During those years, he became obsessed with a question that had nothing to do with physics: what if matter itself has an interior life? The detour produced *Nanna, or On the Soul-Life of Plants* and eventually the philosophical framework that inspired both William James and Ernst Mach. His most productive conceptual moves happened when he was, by any professional metric, completely derailed. There's something worth sitting with here. The philosophy of science tends to treat anomaly as a signal to correct and return — an interruption in the normal flow of productive work. But Fechner's trajectory suggests a different possibility: that the enforced departure from a field sometimes produces the conceptual vocabulary that field was missing. The Fechner who returned to sensory science had been marinated in questions about consciousness and continuity that physicists weren't asking. His psychophysical law — the first mathematical description of the relationship between stimulus and sensation — came from someone who had spent years thinking about things that had no obvious scientific application. The practical implication is not 'embrace failure' as a motivational poster slogan. It's more specific: when a project stalls or collapses, the questions you find yourself asking *instead* are not distractions. They may be the productive residue.

What have you been circling back to during your least productive periods — and have you ever followed it seriously?

Drawing from German Naturphilosophie / History and Philosophy of Science — Gustav Theodor Fechner (Nanna, 1848; Elements of Psychophysics, 1860)