“You must expect failure after failure after failure before you succeed.” – Edwin Land

“Progress is a nice word. But change is its motivator. And change has its enemies. Only those who dare to fail greatly can ever achieve greatly” – JFK

“策に三策あるべし—A案・B案・C案・撤退” – 北尾吉孝 (SBI)

You need to know what you are aiming for (i.e., a measure of success—e.g., money earned), but also what would constitute as failures. You need to define errors, otherwise you wouldn’t correct them.

Know when to cut losses in advance, to advance.

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