大般涅槃經義記 5.55

5.55

次明老苦，先問後辯。於中，初二麁細分別，從始至終運運衰變名「念念老」，一報之窮年垂根熟名「終身老」；後二約就時別以分，從初乃至盛年已前衰變之事名「增長老」，年衰已後名「滅壞老」。

Next, the suffering of aging is explained, first questioned and then discerned. Within this, the first two are distinguished as coarse and subtle: the gradual decline and alteration moment by moment from beginning to end is called "moment-to-moment aging"; the exhaustion of a single retribution when one's years decline and faculties ripen is called "lifelong aging." The latter two are distinguished with respect to differences in time: the occurrences of decline and alteration from the beginning up until the prime of life are called "growing aging"; after years decline, it is called "decaying aging."