Parshios Acharai Mos and Kedoshim both go in depth explaining the process of being holy; when we must be holy and, miztvos of holiness. In Acharai Mos it explains that the holiest day of the year is Yom Kippur. On Yom Kippur, the nation separates themselves from the world we live in; the Kohen Gadol does many preparations in order to enter into the holiest room – The Kodesh Kodashim. In parshas Kedoshim there are many mitzvos brought down such as shatnes, sexual relations, being separate from other nations and more. Just recently we finished celebrating the holiday of Pesach where we physically prepared and cleaned our houses and our belongings in order to be “holy”. Then, we entered into the days of Sfirat HaOmer which is too, a time where we mentally prepare our souls to be “holy” in order to receive the Torah on Shavuot.
In Parshas Kedoshim, the command from Hashem to be holy is because we must emulate Him through doing mitzvos. In order for us to emulate Him we have to prepare ourselves so we can become a vesicle for Hashem’s blessings. During Sfirat HaOmer we are counting up which symbolizes that we need to hoist ourselves in order to receive the holy Torah. We do this to reach the pinnacle of the true meaning of “Va-Yichan Sham Yisroel” which is the true definition of unity of Am Yisroel; as Rashi says, “Eish Echad Be’Lev Echad”; and this should be the result of counting the days.
Girl learning in Midreshet Yeud