[off topic] I'd go with "read" :). I'd very much prefer if an author called their own work "excellent" rather than admitting they understood some of the things they wrote about, after rereading their own work.
[on topic] This kind of articles makes me think how (in)adequate we are to decipher an alien transmission and language. We'll probably have to rely on "their" vastly superior intellect to make the language understandable for us. We still struggle to understand languages spoken by other humans basically identical to us, whose language evolved in conditions perfectly familiar to us (planet, environment, common concepts, etc.), and lived a mere 3500 years ago.
> It's one of the best things I've ever written
Do you mean one of the best things you've ever read? Or did you just call your own work "really excellent"?