法華玄論 9.140

9.140

答：言其大網則彌綸太虛，故言虛空法身。語其妙則無相無為，故云實相法身。辨其能應則無感不形，故云感應法身。說其生則本之法性，故云法性生身。明其體則眾德所成，故云功德法身。約其義異故有眾名不同，考而論之一法身也。

Answer: Speaking of its grand outline, it encompasses the great void, hence it is called the space-dharmakāya. Speaking of its subtlety, it is signless and unconditioned, hence it is called the true-mark dharmakāya. Discerning its capacity to respond, there is no resonance without its taking form, hence it is called the resonant-response dharmakāya. Expounding its origination, its root is the dharmatā, hence it is called the body born of dharmatā. Clarifying its substance, it is constituted by all virtues, hence it is called the merit-dharmakāya. Approached in terms of their distinct meanings, there are different names; but examining them, it is one single dharmakāya.