大般涅槃經義記 5.289

5.289

又問：識等同是苦果，何故現在偏說識等，未來說生死？理亦齊等，但現在世生起已竟，是故當相宣說識等；未來未起，令人生厭，故說生死。

Another question: Consciousness and the rest are all alike suffering fruits; why are consciousness and the rest exclusively spoken of in the present, while birth-and-death are spoken of in the future? In principle they are also equal, but in the present lifetime their arising is already complete, and therefore according to their characteristics consciousness and the rest are proclaimed; in the future they have not yet arisen, so to induce revulsion in people, birth-and-death are spoken of.