They are a reminder that the temple is a symbol for the garden of Eden. See also the Song of Songs with its emphases on topography.

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John
Evangelical Free Church, no offices held
Langhorne, PA

[B]δός δοξαν τῳ θεῳ.[/B]
[B]ιδου ποιω τα εσχατα ως τα πρωτα.
הבל הבלים[/B]