The Japanese popularised that saying when they were trying to get me out of their country. I got the idea, about a decade later.
Some people think i'm smart. Everyday We watch Allen interact with many people much smarter than Allen. The difference is management. Managing one's resources, applying the appropriate resources where necessary...& when to wait, 改善, giving everything, 110% of the time, knowing when to retreat, knowing when to run as hard & as fast as one can into that wall, which you hit. Hard. Falling down.
Getting up. Again & again & again. Those are much more important than smarts.