Most people treat forgetting as a failure of mind. But the medieval Jewish philosopher Shlomo ibn Gabirol argued that wisdom isn't accumulated — it's distilled. The mind that retains everything is not richer; it's cluttered. Recent work by neuroscientist Björn Rasch on memory consolidation shows something similar from a completely different direction: the brain actively prunes during sleep, and this pruning — not the storing — is what sharpens judgment. The insight these two traditions converge on is this: what you let go of shapes your thinking more than what you hold onto. This isn't about forgetting names or faces. It's about the deliberate act of not carrying every past judgment, every settled opinion, every previous version of a problem into the next encounter with it. The person who can meet a familiar situation without their full archive of conclusions about it is genuinely rarer — and more effective — than the one who 'knows more.'

What is one conclusion you've been carrying about a person or situation that you've never actually re-examined since you first formed it?

Drawing from Medieval Jewish Philosophy / Cognitive Sleep Science — Shlomo ibn Gabirol & Björn Rasch