The mind is calm and naturally cool. What is the previous sentence?

A non-meditation room won’t be hot, and it will cool the mind when it is quiet.

This sentence comes from Bai Juyi's "The Zen Room of Master Hengji" written by Kureti. Bai Juyi once visited the eminent monk Hengji Zen Master when the weather was very hot. He saw the Zen Master sitting quietly in a Zen room as closed as a steamer, not sweating like ordinary people. Bai Juyi was so shocked that he wrote a poem titled "The Zen Room of Master Hengji" written by Bitter Heat: "Everyone goes crazy to avoid the summer heat, but only the Zen master does not leave his room. If it is not a Zen room, it will not be hot, and it will cool the mind when he is still." Qingxin Jingqi. It is the highest state of summer escape. It seems that "calm mind and natural cooling" is indeed a good way to relieve summer heat.

Bai Juyi (772-846), whose courtesy name was Letian, also known as Xiangshan Jushi, and also Mr. Zuiyin, was originally from Taiyuan. He moved to Xiagui when his great-grandfather was around. He was born in Sincheng, Henan. He was a great realist poet in the Tang Dynasty and one of the three major poets in the Tang Dynasty. Bai Juyi and Yuan Zhen jointly advocated the New Yuefu Movement, known as "Yuan Bai" in the world, and "Liu Bai" together with Liu Yuxi.

Bai Juyi's poetry has a wide range of themes, diverse forms, and simple and popular language. He is known as the "Poetry Demon" and the "Poetry King". He became a bachelor of the Hanlin Academy and a doctor of Zuo Zanshan. In 846 AD, Bai Juyi died in Luoyang and was buried in Xiangshan. There is "Bai's Changqing Collection" handed down from generation to generation, and his representative poems include "Song of Everlasting Sorrow", "Charcoal Seller", "Pipa Play" and so on.