About this quote

When plans break down you get plain feedback about what actually happened. It hurts, and that pain is useful—notice what failed and who made which choices. Write down one clear fix, try it, then measure the result. Repeat those small corrections and your skill improves faster than hoping for luck.

When to use it

• After our product launch tanked and retention fell off a cliff, I told the team, "The greatest teacher, failure is," then we ran customer interviews and rebuilt the roadmap.
• When I failed the final exam I said to myself, "The greatest teacher, failure is," and switched to timed practice problems instead of passive rereading.
• After I lost the race because I went out too fast, I muttered, "The greatest teacher, failure is," then adjusted my training to work on pacing and recovery.
• When a bad investment wiped out part of my savings I thought, "The greatest teacher, failure is," and created a strict checklist for future deals.