פָּנִ֣ים ׀ בְּפָנִ֗ים דִּבֶּ֨ר יְהוָ֧ה עִמָּכֶ֛ם בָּהָ֖ר מִתּ֥וֹךְ הָאֵֽשׁ׃
<span class="x" onmousemove="Show('perush','El Rambam explica esta parte del versículo en el <b>8º Capítulo</b> de Las Leyes de los Fundamentos de la Torá.',event);" onmouseout="Close();">Cara a cara habló El Señor; con vosotros</span> en el monte de en medio del fuego,
Rashi
פנים בפנים FACE TO FACE — R. Berechia said: Thus did Moses, in effect, say: Do not think that I am misleading you with something which does not exist at all, as an agent does acting between the vendor and the purchaser; behold, the seller Himself is speaking to you (God who transmitted the Torah to you) (cf. Pesikta Rabbati 21: Pesachim Rabbah פ' י' הדברות קמייתא).
Ibn Ezra
face to face i.e., without an intermediary. When someone’s voice can be heard directly, it is called “face to face”, even if his face cannot be seen.
Sforno
פנים בפנים, not in a nocturnal vision when you were asleep.