LEV276 Holiness is attained by living among other people. God commanded Moshes to state this verse in front of "the entire congregation," that is, in assembly, because the majority of the essentials of the Torah are summarized herein. (Sifra cited by Rashi). The Chasam Sofer commented that to attain holiness we need not be isolated and withdrawn from the rest of society. On the contrary, the admonition to be holy was stated in assembly. A person must learn how to sanctify himself by behaving properly amongst people. (Otzer Chayim, vol. 3, p. 114).