《宋书·志·卷十三》
我听说到了节令就安排农事，从事农业是为了充裕生活，这是人们生活中最根本的大事，历法的重要我看不是祖独之肤浅的考虑就可以修改的。
窃闻时以作事，事以厚生，以此乃生人之大本，历数之所先，愚恐非冲之浅虑妄可穿凿。
I heard that arranging agricultural activities by season is to have sufficient life, which is the most fundamental thing in people's lives. I think the calculation method is not something that Zu Chongzhi's superficial considerations can modify.