妙法蓮華經玄義 2.170

2.170

三藏是界內不相即，小乘取證，根敗之士，故不論接。餘六是摩訶衍門，若欲前進，亦可得去，是故被接。

The Tripiṭaka is non-identical within the realms, where Hīnayāna practitioners attain realization as individuals of ruined faculties; therefore being received is not discussed. The remaining six are gates of the Mahāyāna: if one desires to advance forward, one can proceed; therefore they are received.