Musar su Esodo 25:10

The construction of the Tabernacle, first reported in Parshat Terumah, commences with the Torah's instruction to make the Holy Ark, the repository of the Tablets, symbol of the light of Torah. When you invert the letters in the word ארון, Ark, you have אורן, "their light." This alludes to the fact that the Torah in the Ark is the source of light for all of us. Parshat Tetzaveh, on the other hand, commences with the commandment to provide the oil for lighting up the lamps of the Candlestick. When we look at the adjective used by the Torah for the olive oil to be used, i.e. זך, we note that the word זך has a numerical value of 27, i.e. the number of different letters used in the written Torah when we include the five "final" letters as separate letters. The word כתית which describes the pounding the olives have to undergo before they yield the oil, is an allusion to the way in which a potential Torah student has to "pound himself" in order to study with the proper kind of dedication. We find an allusion to this in Esther 8,16: ליהודים היתה אורה ושמחה וששון ויקר, "The Jews enjoyed light and gladness, happiness and honour." The word אורה is a reference to Torah. They emerged from the darkness caused by Haman into a great light, the light of Torah."