四分律行事鈔資持記 2.233

2.233

別簡中，初科，前簡所緣。得罪現在者，隨中持犯，必對實境故。過未唯起心者，境非對現，止可心緣故。說言者，顯非皆實故。若下，次簡所發。一念者，局三法竟，一剎那時。以前明緣，境通三世，發戒通相續；此須重簡，局示分齊。

In the specific differentiation, the first subheading: first, differentiating the object of cognitive conditioning. Incurring an offense in the present is because maintenance and violation within subsequent [practice] must confront a real realm. Generating a mind only toward past and future is because the realm is not directly present, so it can only be cognized by the mind. Saying "speaking of" shows that not all are real. Below "If," it next differentiates what is generated. "A single thought-moment" is restricted to the conclusion of the three karmavācanās, the time of a single kṣaṇa. Because in the earlier explanation of conditions the realm extended to the three times and the generation of precepts extended to continuity, here it must be redifferentiated to restrictively indicate the boundary.