本文嘗試討論「應」在郭象哲學中的意涵，並歸結出，在郭象哲學中，聖王之所以能「內外相冥」與其能「應」有密切的關係。「應」在郭象哲學中同時具有內向及外向性意義，前者指向聖人的心靈狀態及能力，後者則指向聖人與眾人的互動以及行事作為。「應」的內向意義能說明聖人的無待逍遙，而其外向意義則能解釋聖人如何能讓眾人在「不失其所待」的條件下，與聖人同樣獲得逍遙。

This article is to discuss the meanings of response” (Ying) in Guo Xiang’s philosophy and conclude that the sage king’s capability in “external and internal harmony” is closely related to his ability in response. In Guo’s philosophy, “response” has internal and external meanings, while the former refers to the sage’s spiritual state and capacity, and the latter refers to the sage’s interaction and dealings with people. The internal meaning of “response” explicates the sage’s enjoyment without dependence, while the external meaning of “response” explains how the sage could make people as carefree as he is “without losing their dependence.”