The Tefillin of the Master of the World
"VeAmartem Zevach Peshach Hu laHashem" - Shemos 12:27 (You shall say it is a pesach offering to Hashem).
Kedushas Levi Parshas BoWe must try and understand why it is, that when we call the yomtov or holiday called by the Torah "Chag HaMatzos - the feast of unleavend bread," (Shemos 23:15), we call it Pesach. Where do we find a hint in the Torah that we should call this yomtov by the name Pesach? In the entirety of the Torah this holiday is called Chag HaMatzos.
It is written in Shir HaShirim 6:3, "Ani leDodi veDodi li; I am my beloved and my beloved is mine." This indicates that we speak the praises of the Holy One Blessed be He, and He in returns praises us [Israel. So too when we wrap the tefillin they contain the praise of the Holy One Blessed be He, and when the Holy One Blessed be He wraps His 'tefillin' it is written in them the praise of Israel [the Jewish people. (see Brachos 6a)
This will help us understand that which is written in the midrash Tana D'Vai Eliyahu that "it is a mitzvah to speak the praises of Israel - the Jewish people and that Hashem Yisborach has great nachas and pleasure from this praise.1 It seems that the reason is because it is forbidden for you to stop thinking of Tefillin while wearing them (Menachos 36b). It is a mitzvah for each man to continuously be occupied with tefillin, [alluding to meaning to say that he should be either praising yisroel, the Jewish people or praising the Holy One Blessed be He. The praise of Israel refers to the Tefillin of the Master of the World in which the praises of the Jewish people are written as is taught in the Gemarra (Brachos 6a), "What is written in the Tefillin of the Master of the World ? Who is like (comapred to) your nation Israel?" The praise of the Holy One Blessed be He hints at our tefillin which contain the praise of Hashem yisborach meaning the parshios of Shema, Kadesh, veHaya (Menachos 34b). Therefore it comes out that we are constantly praising Hashem yisborach and Hashem is constantly praising Yisroel, us.