【瑕瑜互见】〖xiá yú hù jiàn〗[see both its good and bad points; Every white has its black and every sweet its sour; have both strong and weak points; have both correct and mistaken aspects]

瑕疵难遮玉晶莹，

瑜珥瑶环竞贤能。

互惠结合共一体，

见德思齐赶并行。