《后汉书·列传·李固列传》
一般地说，太高就危险，太满就溢出，月亮满了就缺，太阳到中午就偏移。
月者，大臣之体也。夫穷高侧危，大满则溢，月盈则缺，日中则移。
Generally speaking, being too high is dangerous; being too full causes overflow; the moon when full becomes deficient; the sun when at noon declines.