Peace of mind refers to a natural peace of mind when dealing with people, things and living alone. The original meaning of calm and natural coolness is calm and natural coolness. Later, it was used to refer to dealing with problems in life with a calm mind when encountering problems, difficulties and setbacks.
Don't care about hot and cold, ignore it. You say it's very hot, but when you think it's very hot, you will be even hotter. The so-called peace of mind is natural and refreshing, which is the truth of practice. In other words, when you are in trouble or danger, you should put it down, so Zen says "put it down". If you ignore it, there will be nothing, at least it will be much easier.
Bai Juyi, a poet in the Tang Dynasty, visited the Zen master Henderson. It was very hot, but he found Master Hengji sitting quietly in the room. Bai Juyi asked, "Zen master! It's too hot in here! Why not go somewhere cool? Master Hengji said, "I think it's cool here! "Bai Juyi felt something about this, so he wrote a poem: Everyone is crazy in summer, and the only Zen master stays at home; It doesn't mean that there is no heating in the meditation room, and it is cool to be calm.
Extended data:
In the Qing Dynasty, Yong Zhengdi complied with the instructions of Emperor Kangxi and edited the Courtyard Motto. One of the instructions is called "be calm and naturally cool", to the effect that as long as you can achieve inner peace, you will not be hot. "People who don't open the window to enjoy the cool in summer are not hot because they are used to it since childhood and because they are calm."
Also put forward, "and Xia Yue is not greedy for cold, which is also very beneficial to the body. If the moon in summer is full of yin, if you enjoy the comfort of cool air for a moment, you will turn off the heat in summer. I didn't feel hurt at that time, but I got sick later. Every time I see someone with a stomachache in late autumn, it is because I am greedy for the cold outside and the heat inside. "
References:
Baidu Encyclopedia-Calm mind and calm nature