唯識二十論述記 2.46

2.46

Commentary: Showing the reason for having six parts: that is, at the place of the eastern atom, the middle atom has no logical possibility of admitting the five atoms of the other five directions; likewise down to: the place of the lower atom for the middle atom is not the other five places. Because the six conjoined with the middle atom are distinct, the middle atom should have six parts. An inference should be established thus: 'The middle atom should have multiple parts (pratijñā); because the place of one cannot be the place of the others (hetu); like coarse aggregate forms (dṛṣṭānta).' Or within the verse, an inference is also formed: 'The one atom in the middle should have six parts (pratijñā); because it conjoins with six (hetu); like a coarse aggregate form conjoining with six forms (dṛṣṭānta).' However, the verse has only the thesis and the reason, omitting the similar example.