” וַעֲשִׂירִית הָאֵיפָה סֹלֶת, לְמִנְחָה, בְּלוּלָה בְּשֶׁמֶן כָּתִית, רְבִיעִת הַהִין “
” also a tenth of an ephah of fine flour (סֹלֶת) for a grain offering, mixed with a quarter of a hin of beaten oil.”
Many of the offerings in the Holy Temples required bringing fine flour together with the sacrificed animals.
The Zohar reveals that the fine flour is the aspect of Malchut and when it was brought to the altar it was presented to the ‘Supernal King’. As clean and white flour it represented the purity of the offering and the aspect of the central column that was used to draw down the light through Zeir Anpin without any negative aspect.
The fine flour represented the end result after removing the 7 layers of the bran that covers the endosperm (the main and inner white part of the wheat grain).
As we studied in DZ 1284, http://dailyzohar.com/daily-zohar-1284/ , God directly governs the growth of the wheat grains and not through other angels. Offering the fine flour creates a direct connection from Malchut to the Light that originally nourished the wheat.
White and ‘purified’ flour has great energy but it is not good for our body. Its purity affect the blood and the rest of the body negatively. Because it is processed and satisfies the body quickly, it increases the desire of the vessel and makes it grow bigger (=fat). When we eat products made from the whole grain (with the bran, endosperm and germ) it is better for the body. The seven layers of the bran represent the seven Sefirot from Chessed to Malchut and allow the body to process it in a natural and balanced energy as it is fit for the Malchut level.