"And they shall take for you pure olive oil, pressed for the illumination (Kathith Lamaor), to kindle the light perpetually".
The Torah is likened to oil. Through the study of the Torah, Benei Yisrael (the Children of Israel) will merit the Geullah (redemption). The word Kathith (pressed) hints at the two Temples. The Gematria (numerical value) of the word Kathith is 830, which is the total amount of years that the two Temples stood. The first stood for 410 years and the second stood for 420 years.
Through the study of the Torah they will be rebuilt and become "Lammaor" (for illumination). However, unlike the first two Temples which were destroyed, the third Beth Hammiqdash (Temple) will stand forever. A hint to this is seen in the words "Leh-'aloth Ner Tamid" - to kindle the light 'perpetually'.
(See Kether Saddiq, Parashath Tesawweh)
