機鋒  / jī fēng /
Sharpness 
Category:
Buddhist Terminology 佛學名相
Description:
禪理之士,機鋒峻烈, 殺活自在,刮垢磨光。
Warriors of Chan,
Armored with remarkable acuity,
Conquered afflictions at ease, the Buddha-nature triumphed,
Scraping and grinding the dirt away.
References:
星雲大師全集【書法類】中華文化佛教名詞 名相 The Complete Works of Venerable Master Hsing Yun: Calligraphy-Terminology 
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