EZEKIEL CHAPTER ONE, the Merkavah vision of Ezekiel, is the haftarah (reading from the prophets) for the first day of
Shavuot (which started yesterday at sundown). This chapter is the foundation for both Jewish and Christian mysticism and its traditions have also been influential on Islamic mysticism. For some comment on the influence of the passage on Jewish tradition, see
Why Read Ezekiel on Shavuot? Tradition connects the prophet's vision to the revelation at Sinai by Michael Fishbane at My Jewish Learning.
In Christian mysticism, Ezekiel's vision was to a large degree mediated through the work of Pseudo-Dionysius the Aeropagite, a late-antique Neoplatonist philosopher and mystic. For more on those traditions, see the Wikipedia article on
Christian angelology.
And for more on Ezekiel's Merkavah vision, see
here and
here and links.
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