Education is what survives when what has been learnt has been forgotten.

The line distinguishes between transient “learning” (the specific facts, dates, or procedures one can recite) and the deeper residue of education: durable habits of mind and behavior. Read this way, education is not the memorized content itself but the capacities that remain when details fade—how to think, inquire, judge evidence, solve problems, and adapt. Attributed to B. F. Skinner, the sentiment also fits a behavioral perspective: what matters is what persists in performance over time, not short-lived recall. The quote is often used to argue for teaching that builds transferable skills and dispositions rather than short-term test preparation.