Most productivity advice is obsessed with doing more. But the 11th-century Persian polymath Ibn Sina — known in the West as Avicenna — argued in his psychological writings that the intellect has a natural rhythm of contraction and expansion, and that forcing sustained output against that rhythm doesn't increase yield; it degrades the quality of the faculty itself. He wasn't talking about rest as recovery. He was talking about something more structural: the mind's capacity for high-quality work is not a fuel tank you refill but a living disposition that either flourishes or atrophies depending on how you use it. What modern cognitive scientists call 'ego depletion' or 'decision fatigue' Ibn Sina understood as a degradation of the rational soul's 'estimative power' — its ability to perceive what actually matters. The practical implication is uncomfortable: your most urgent-feeling tasks are often the ones you should do second, not first, because urgency itself is a signal generated by the depleted mind, not by the situation. Protect the first hour of your sharpest thinking for the work that requires actual judgment. Let the reactive work wait.

If you stripped away everything you did this week that felt urgent, what work of actual consequence would remain — and when did you do it?

Drawing from Islamic Neoplatonist Psychology (Avicennan school) — Ibn Sina / Avicenna (Kitāb al-Nafs / Book of the Soul, from Al-Shifāʾ, c. 1027 CE)