Note 218 — THE THEOGONY.
George Chapman translation
Alternate as they glide athwart The brazen threshold.]
Milton, Par. Lost, vi. 4:
There is a cave Within the mount of God, fast by his throne, Where light and darkness in perpetual round Lodge and dislodge by turns, which makes through heaven Grateful vicissitude, like day and night: Light issues forth, and at the other door Obsequious darkness enters, till her hour To veil the heaven.