The Pilgrim's Progress by John Bunyan

Then the Pilgrims said to each another, "We had need to cry to the
Strong One for strength!"
SHEPHERDS: "Yes, and you will also have need to use that strength,
when you have it.
"By this time the Pilgrims desired to resume their journey, and the
Shepherds agreed. So they walked together towards the end of the
mountains.
The Shepherds then said to each other, "Let us here show the Pilgrims
the gates of the Celestial City — if they have skill to look through our
special telescope.”
The Pilgrims cordially agreed — and were taken to the top of a high hill,
called Clear, and were given the telescope. When they attempted to look
— the remembrance of that last thing that the Shepherds had shown
them, made their hands shake. With this impediment, they could not
look steadily through the telescope. Yet they thought they saw
something like the gate of the City, and also some of the glory of that
place.
Then they went away, and sang this song:
"Thus, by the Shepherds, secrets are revealed,
Which from all other men are kept concealed.
Come to the Shepherds, then, if you would see,
Things deep, things hid, and that mysterious be.”
Amos 3:3…he reveals his secret unto his servants…
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