《贞观政要·卷八·辨兴亡》
周朝虽然衰微，六国无罪，秦国完全是倚仗智诈暴力，像蚕吃桑叶一样，逐渐吞并诸侯的。
周室微，六国无罪，秦氏专任智力，蚕食诸侯。
Although the Zhou Dynasty was in decline, the Six Kingdoms were innocent. The Qin State relied entirely on cunning and violence, annexing the vassals like a silkworm eating mulberry leaves.