“As soon as there is 'is', there is 'is not'.”Zhuangzi · Zhuangzi · -300 · capitolul 2
Every label you place automatically gives birth to its opposite.
Zhuangzi points out that judgments do not come alone: the moment you fix a standard of value, you generate its opposite. Call something beautiful and you have already imagined an ugliness to measure it against; declare something true and you have invented error. Categories come in pairs, never in isolation. That is why disputes over who is right are often artificial: each side stands on its own half of a boundary it drew itself. For example, naming one employee "high-performing" implicitly labels a colleague "mediocre," even when the difference rests on an arbitrarily chosen standard.
Why it matters It helps whenever you catch yourself labeling people or situations with too much certainty: remember that your label creates its opposite too, and that someone else might draw the line differently.