WinnieThePooh: People say a lot about “we know” or “we don’t know” when there have been different opinions throughout Jewish history. There have been rishonim who acknowledged (and in the case of Raavad even gave tacit approval in some ways) to the idea of God having some kind of “hand” or “finger,” for example, and some parts of the Torah have been described as purely mashal (with Rambam saying that the entire Iyov is purely mashal). There are also a lot of different opinions on which midrashim to take or not take literally.
SO take “everyone knows” with a grain of salt.