《淮南子·泰族训》
圣人能从重重叠叠的现象背后看到祸福的转化，并能考虑到曲折乖戾处的祸患。
圣人见祸福于重闭之内，而虑患于九拂之外者也。
The sage can see the transformation of misfortunes and blessings behind the many overlapping phenomena, and can also consider the misfortunes and calamities in the twists and turns.