The three voids or immaterialities. The first set of three is (a) 空, (b) 無相, (c) 無願, v. 三三昧. The second, (a) 我空 , (b) 法空 , (c) 倶空 the self, things, all phenomena as "empty" or immaterial. The third relates to charity: (a) giver, (b) receiver, (c) gift, all are "empty".
(一)唯識家依遍、依、圓三性立三空之義。即:(一)無性空,又稱無體空。謂遍計所執性於妄情之前雖有,然其體性實無。(二)異性空,謂依他起性之體相異於遍計所執,雖非空無,然亦如妄情所執而非有。(三)自性空,謂圓成實性即諸法之自性,顯示人法二空。又顯揚聖教論卷十五亦依遍等三種自體而立無體空、遠離空、除遣空三空。〔辯中邊論卷中、中邊分別論卷上、辯中邊論述記卷中〕
(二)依所執而分空為三種。即:(一)我空,又作人空。於五蘊之法強立主宰,稱為我執;若推求色、受、想、行、識皆無自性,不見我體,稱為我空。(二)法空,於五蘊之法計為實有,稱為法執;若推求五蘊之法如幻如化,皆從緣生,無有自性,稱為法空。(三)俱空,我法二執既遣,能空之空亦除,空執兩亡,契於本性,稱為俱空。〔金剛經疏論纂要卷上、金剛經纂要刊定記卷一〕
三空 (1) Three emptinesses described in the 金剛三昧經: emptiness of marks, emptiness of emptiness, emptiness of that which is empty. (T vol. 9, 367B) (2) According to Kihwa in his O ka hae sŏrŭi 五家解説誼, the emptiness of self 我空, emptiness of elemental constructs 法空 and emptiness of emptiness 空空 (HPC 7.12a). (3) The emptiness of self, emptiness of elemental constructs, and the emptiness of both. (4) Emptiness 空 marklessness 無相 and wishlessness 無願. (5) In the practice of dāna, the emptiness of giver, receiver, and that which is given. (6) The emptiness of non-nature 無性空, the emptiness of changing nature 異性空, and the emptiness of self-nature 自性空.
1.指空、無相、無願之三解脫,因此三者都是闡明空的道理,故名三空。見三三昧條。2.指布施時,應觀受者施者與所施物之相皆空。
三空===﹝出金剛經刊定記﹞
〔一、我空〕,謂於五蘊之法,強立主宰,名為我執。若推求色受想行識之五法,皆無自性,不見我體,是名我空。(五蘊者,色蘊、受蘊、想蘊、行蘊、識蘊也。)
〔二、法空〕,謂於五蘊之法,計為實有,名為法執。若推求五蘊之法,如幻如化,皆從緣生,無有自性,是名法空。
〔三、俱空〕,謂我、法二執既遣,能空之空亦除,空、執兩亡,方契本性,是名俱空。
(名數)言空,無相,無願之三解脫也。此三者共明空理故曰三空。【參見: 三三昧】。【又】布施行,言受者施者布施物三相之空也。少室六門二種入曰:「行檀捨施,心無怖惜。達解三空,不倚不著。」