Anu ma’amirekha ve’Atah ma’amireinu. Artscroll renders this line from the machzor as referring to we as Hashem’s designated, and Him as our designator.I would like to suggest a different translation. The mishnah says that Hashem created the world with “eser ma’maros — ten utterances”. Ma’amar means utterances, and in particular, Chazal associate it with the ten statements through which Hashem created the world. Existence is words. The Ba’al Shem Tov stresses that the idea is speech, not writing. Texts are written, and then continue to exist afterward. Spoken words exist as long as they are being spoken. For light to exist now, it means that Hashem is still saying the words “yehi or” even today. The words themselves are the phenomenon we call light.
I therefore believe the relationship described is “We are your statement, and You are the One Who speaks us.”