The last two stanzas are quotes from the Second Epistle of Paul
to the Corinthians 3:14-16 which are translated
in the earlier King James Bible as:

'But their minds were blinded: for until this day
remaineth the same vail untaken away in the
reading of the old testament; which vail
is done away in Christ.

But even unto this day, when Moses is read,
the vail is upon their heart.

Nevertheless when it shall turn to the
Lord, the vail shall be taken away.'
The last three lines of the eighth staza are a
translation of the lines that appear in
Book VIII, 788 of Georg Hegel's publication
of the Phenomenology of Spirit (1807).

Only John (18:1) associates
Gethsemene as a garden, and precedes
this by locating it beyond the brook/
ravine of Cedron/Kidron that
is outside of Jerusalem.