71、刀不磨要生锈，水不流要发臭。
If the knife is not ground, it will rust; if the water does not flow, it will stink.
72、有理不可丢，无理不可争。
Reason cannot be discarded and unreasonable cannot be disputed.
73、讳疾忌医，难求良药。
It is difficult to seek good medicine for taboos and taboos.
