These words, understandably, are describing a lofty spiritual concept. But we have no loftier day of the year than the day of the giving of the Torah. All other days of the year, with almost no exceptions, are on a level of after the sin of Adam. The giving of the Torah was a level reminiscent of before the sin of Adam. (To some degree, Rosh HaShanah is also on a level of before the sin of Adam, from the perspective of time.) We have one day of the year, the day when the Torah was given to Yisrael, where we were free from the Angel of Death, and when the spirit of impurity left us entirely.
Each year, the spiritual light of this day returns. Although it is not completely revealed, due to the presence of sin today, it is still allowed to shine, and it exists in a concealed dimension.
The power of Yisrael to bond with Hashem from the depths of their neshamos – that spiritual light is allowed to shine during this time of the year. It is the power of each individual Jew to reach the raishis/beginning of his soul. From there a person can connect to the Torah which is called raishis – and, as explained, this is not the level of Torah of “after” Creation, but the level of Torah as it was before Creation, at its very beginning.
At that level, the Jewish people enjoy a bond with the Torah as if they are “twins” with the Torah, who have been born together, [and who are seen as ‘always being together’] – and even more so, they have this relationship of “twins” towards Hashem, as it were.
