张景岳早年习武从军，后转攻医学，兼通《易》理，提出「阳非有余，阴常不足」的命门学说，力倡温补肾阳肾阴，反对滥用寒凉攻伐，是明代温补学派的集大成者。他晚年将毕生所学整理为《景岳全书》，并著《类经》将《黄帝内经》按类别重新编排注释，条理清晰，便于研习，影响极为深远。

Zhang Jingyue served in the military in his youth before turning to medicine, later incorporating principles from the Book of Changes into his theory of the "life gate," arguing that yang is never truly in excess while yin is chronically deficient, and advocating warming tonification of kidney yang and yin over aggressive cooling treatments. He is considered the culminating figure of the Ming-dynasty Warming and Tonifying School. Late in life he compiled his complete body of work into the Complete Works of Jingyue, and also reorganized the Yellow Emperor's Inner Canon by topic with commentary in his Classified Canon, a work of lasting influence for its clarity.