Seo Gyeong-deok
Introduction '''Seo Gyeong-deok''' (18 March 1489 – 13 August 1546) was a Korean Neo-Confucianist philosopher during the Joseon Dynasty. His philosophy studied materialism and phenomenology based on ancient taoist philosophy theories absorbed by neoconfucianism, like Yin and Yang and Ki.
Family * Father - Seo Ho-beon (서호번, 徐好蕃)** Grandfather - Seo Sun-gyeong (서순경, 徐順卿)*** Great-Grandfather - Seo Deuk-bu (서득부, 徐得富)* Mother - Lady Han of the Boan Han clan (보안 한씨, 保安 韓氏)* Sibling(s)** Younger brother - Seo Sung-deok (서숭덕, 徐崇德)* Wives and their issue** Lady Yi of the Taein Yi clan (태안 이씨, 泰安 李氏); daughter Yi Gye-jong (이계종; ? - 7 January 1561)*** Son - Seo Eung-ga (서응가, 徐應暇)*** Son - Seo Eung-gi (서응기, 徐應麒)**** Grandson - Seo Woo-shin (서우신, 徐佑申)**** Granddaughter - Lady Seo of the Dangseong Seo clan (당성 서씨)***** Grandson-in-law - Im Ryeon (임련, 任鍊)**** Granddaughter - Lady Seo of the Dangseong Seo clan (당성 서씨)***** Grandson-in-law - Yi Eung-jo (이응조, 李應祚)**** Granddaughter - Lady Seo of the Dangseong Seo clan (당성 서씨)**** Granddaughter - Lady Seo of the Dangseong Seo clan (당성 서씨)*** Daughter - Lady Seo of the Dangseong Seo clan (당성 서씨)**** Son-in-law - Yu Gyeong-dam (유경담, 柳景湛)***** Grandson - Yu Ik (유익, 柳益)***** Granddaughter - Lady Yu (유씨)****** Grandson-in-law - Yun Bok (윤복, 尹福)***** Granddaughter - Lady Yu (유씨)****** Grandson-in-law - Kang Ho-seon (강호선, 康好善)** Unnamed concubine*** Son - Seo Eung-bong (서응봉, 徐應鳳)**** Grandson - Seo Chun-hak (서춘학, 徐春鶴)**** Grandson - Seo Woon-hak (서운학, 徐雲鶴)*** Son - Seo Eung-gu (서응구, 徐應龜)
Works Seo was a great scholar of the day. He counted among his students the famed gisaeng Hwang Jini, for whom he wrote this sijo:Other works:* ''Hwadamjip'' (화담집, 花潭集) - collection of his writings* ''Woniki'' (원이기, 原理氣) - About origin of Qi* ''Igiseol'' (이기설, 理氣說) - about processing of Qi* ''Taeheoseol'' (태허설, 太虛說) - About Mu of Qi* ''Gwisin sasaengnon'' (귀신사생론, 鬼神死生論) - about spirit of soul and life and death.
Disciples * Hwang Jin-yi - Korean poet and artist* Heo Gyun  - Korean novelist, philosopher, and politician* Yi Ji-ham (이지함) - Korean astrologer, diviner, and politician* Heo Nanseolheon - Korean poet* Han Baek-gyeom (한백겸) - Geographer and philosopher* Park Sun (박순)  - Philosopher and politician
References