憨山德清被稱為明末四大師之一，是一位教理及禪觀並重的高僧，教理重於華嚴，禪定重修實悟。〈觀心銘〉詩偈是禪修心要，指出修行皆離不開身和心，重點在於參究心的作用。
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Guan Xin Ming- By Hanshan Deching
Hanshan Deching, renowned as one of the four Buddhist masters in the late Ming dynasty, gave equal weight to Buddhist doctrines and meditation. The eminent monk focused on the Huayen school of dogmas and the meditation practice leading to true enlightenment. The gatha Guan Xin Ming from him, its content being doctrinal essentials for meditation practice, addresses the involvement of body and mind in the practice and the critical importance of understanding the role of mind (the heart).