The influence of Chan master Dahui Pujue (1089-1163 CE), one of the most distinguished Chan masters of the Song dynasty, whose authority also spread to Korea and Japan, is still felt today. He is remembered for the method of focussing meditative attention on the key phrase of a koan (kan huatou) and was a lively critic of 'silent illumination Chan'. His letters reveal a deep compassion for the ordained and laity alike. Translated by Randolph S. Whitfield