“Nintai” (忍耐) is a dynamic Japanese term that the dictionary simply describes as; “to persevere”. But it is more than that.
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Nintai is an adherence to a course of action, belief, or purpose without giving way. Perseverance, persistence, tenacity, steadfastness and patience all define Nintai. Each of these conveys a sense of endurance in the pursuit of a desired end.
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Nintai is adherence to your decided course of action.
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Sticking to your belief or chosen path, without giving way. But don’t confuse perseverance with stubbornness. Nintai is the power of enduring without complaint, without looking for quick results. Because, as you know, there are none.
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There are times when training is hard. Times when training is physically demanding, like when you have injuries for example, or other obstacles in your way. And times when it becomes mentally frustrating. But don’t let that stop you. Nintai is the will for striving… and our will drives us to succeed.
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Eventually this type of thinking becomes a habit that spills over into your daily life. You will notice it, and people around you will too. And that is the beauty of it.
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There is a Japanese proverb that goes; Nintai wa iwa o mo tōsu 忍耐は岩をも通す (patience will pierce even a rock)
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Live by “Nintai”. 
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With thanks to Jesse Enkamp
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