[jesterswilde]

In it, the author contrasts 无 (Wú) and 有 (Yǒu). For some extra context of that specific contrast, here are a couple excerpts from the first poem of the Dao De Jing. (spacing is mine)

无 名天地之始

有 名万物之母

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故 常无欲，以观其妙

... 常有欲，以观其徼。

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The duality of 'with' and 'without', existence / non-existence is central and embodied heavily by those 2 words.

I am (slowly) trying to learn Chinese by reading the Dao, or possibly the other way around. I ran across this site (which I have 0 affiliation with) but it seems to be a small and unique site made by someone who just wanted it to exist, which very HN: https://dao-de-jing.com/