Eleazar of Worms, Hokhmat ha-Nefesh, ch. 46, p. 75.

Jewish Mysticism
All that which was shown to the prophets, the mind saw, as is the case of the “archons of the cup” and the “archons of the thumbnails.” All depends on [one’s] thought… the Creator places thoughts within the visual imagination (mahshevet ha-re’iyah) and shows them to the prophet. Thus it is with respect to everything the prophets saw… the vision that appears to the person is not due to a physical vision (re’iyat ha-‘einayim), for even a blind man can see the angel of death.

Translated by Elliot Wolfson in Through a Speculum that Shines- Vision and Imagination in Medieval Jewish Mysticism, Princeton- Princeton University Press, 1994.