And you shall command the children of Israel, that they bring to you pure oil of olives crushed for
lighting, to raise an everlasting lamp... from evening to morning (Exodus 27:20-21)
These verses contain a paradox: "everlasting flame" implies a state of
perptuality and changelessness; "from evening to morning" implies
fluctuating conditions of lesser and greater luminance.
For such is our mission in life: to impart the eternity and perfection of the
Divine to a temporal world, and to do so not by negating the
world's temporality and diversity, but by illuminating its every state and
condition -- from "evening" to "morning" -- with the divine light.
(The Lubavitcher Rebbe)