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Training day and night to decide well
Miyamoto Musashi linked practice and judgement directly. You must train day and night in order to make decisions. In combat, there is no time to deliberate. The right move must come instantly. Only thousands of hours of preparation make that possible.
Research on expertise supports this. Experts in chess, medicine and firefighting recognise patterns quickly because they have seen so many situations before. Their fast decisions are not guesses. Instead, they draw on deep internal libraries built through practice.
What day and night training looks like today
Training day and night does not mean never resting. Musashi meant constant engagement with one’s craft. Modern versions include studying cases, reviewing past decisions and practising scenarios. For example, pilots rehearse emergencies in simulators so that the right response becomes automatic.
Businesses can apply this too. Teams that run crisis drills respond better when real problems arrive. Similarly, leaders who regularly review difficult decisions become more confident over time. Therefore, deliberate preparation turns pressure into routine.
Personal decisions benefit as well. Thinking through likely challenges in advance, such as a tough conversation or a negotiation, reduces stress when the moment comes. Moreover, prepared people feel calmer, which further improves judgement.
In the end, good decisions rarely appear from nowhere. They grow from steady practice and reflection. Musashi’s demanding standard reminds us that confidence is earned, one repetition at a time.
In addition, review decisions after they play out. Ask what you knew, what you assumed and what you would change. Consequently, each decision becomes a lesson for the next one. Moreover, keeping a short decision journal makes this review easy, and it reveals patterns in your thinking that are otherwise hard to see.
