There are many words in the world that are derived from Buddhism but have changed their meaning over time. The words in the question are hard faith, and they are close to Bushido rather than Buddhism. The idea is to train oneself and protect happiness through the pursuit of martial arts.
So it's like “knowing enough,” “cherishing the happiness that exists now,” “if you say luxury, you'll be punished,” and “if you are content with comfort, you'll be unhappy” → daring to live a simple life, live in poverty, and train.
Dare to live in poverty. That tells me how good Bushido is.
So how about in Buddhism?
Buddhism is the middle path. I'm not talking about taking the middle between luxury and poverty...
Buddhism believes that what really causes dissatisfaction is not an obsession with luxury or improvement itself, but rather an obsession with the philosophy of “being unhappy if you cannot luxury or improve” and “being luxurious or improved is unhappy.”
No matter how much I love the day, the night will come. No matter how much you love the night, daytime will come. So which is happier day or night? No matter how philosophical you are, you'll always be lost. It's the same as that. Breaking out of that philosophical spiral is Buddhism.
By nature, people are born to feel happy just when a fresh breeze blows through their skin. The warmth of the sun, the brightness of the moonlit night, the sound of rain, the coolness of the fog... happiness is something that humans can't solve, and it exists all over the place even before I was born.
People who notice that will gain joy when they improve, and if it is as it is, they will get joy as it is, and they will be able to live with all their heart and soul even in the midst of hardships. That free mind knows the sufficiency of Buddhism.
It is safe for the world to use emotional support in light of the conditions of what is happiness (safety).
Freeing the mind without comparing it to the conditions of what happiness is is peace of mind (anjin) in Buddhism.