The errors we make in the dôjô are our best teachers as long as we do our best to learn from them and correct our attitude (kamae). And then hopefully we will not make them outside when fighting time is coming.
“Shu Ha Ri” can therefore be understood as: do, make mistakes, get rid of the mistakes. Whatever we do in life is about learning and our errors create our success.
Isn’t it why we keep repeating: “shikin haramitsu dai komyô“?