“Arise! Awake! Having reached the Great Ones (illumined Teachers), gain understanding. The path is as sharp as a razor, impassable and difficult to travel, so the wise declare.”
The hint
Extremes meet. The first and last letters were set down first, then the next pair inward.
The cipher
A T S N C E
— The Katha Upanishad · III.14
Enter this door
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