No matter how great you become, you have to realize that being Sameach B'chelko is before anything else! And even though: כֶתֶר תּוֹרִה the crown of Torah is Hefker (available) to all (Gemara); yet, whoever got too close to the Aron was killed, Rachmana Litzlan. A loud and clear message: The different forms of Kedusha are all exclusive to whoever is appropriate to them.
Around the Bais Hamikdash there was a latticework fence called the: סוֹרֵג “Soreg”, which was there to limit entry (i.e., a Tamei Meis and a gentile were not allowed in). We have a general message for every Yachid (individual): My unique Avoda is only for me, and nobody else. This makes everyone feel special.
And notice how those who are not Cohanim are called a: ז ר stranger, whose punishment is: וְהַזָר הַקָרֵב יוּמָת death. כ ל אֶח ד ו אֶח ד חַי ב לוֹמַר בּ שׁ ב יל י נ ב ר א ה עוֹל ם סנהדרין Every person is obligated to say: “the entire universe was created just for me”, since each human is a world by himself, which no one else has any Shaychus with.
The Shem MiShmuel says (in the name of Chazal) that at Matan Torah, the Malachim kissed every single individual, and the Gr”a says that each person had his own private fence around him!
Day and night, a person needs to remind himself how lucky he is, for what he has, instead of spending his time admiring (and secretly envying) others, for their greatness in Torah, Chesed and Yiras Shamayim.
