Maghen Abraham - Thoughts From Mayer Sasson

"And the Levites… were not allowed to number themselves amongst them – בתוכם" )

 "Any Torah scholar whose inner self is not like his outside shall not enter the Study Hall."

 Concerning that said in the Masechet Avot, "One should raise many disciples" Rabeinu Ovadia of Bartenura explained, "Raise many disciples" – This is compared to Raban Gamliel who said, "Every Torah scholar whose inner self is not like his outside shall not enter the Study Hall." Raban Gamliel's intention was that a person should not be hypocritical and say things that his heart does not feel. Raban Gamliel intended that a person's mouth and heart should be the same - his inside should be like his outside.

 In the sefer Igra Dipircha the Bnei Yissachar explains Raban Gamliel's words according to hidden meanings and he writes, "In the word "תוכו" the Name of G-d is in the inside and in the word "כברו" is on the outside. In other words in the word "תוכו" the inner letters are "כו" which add up in numerology to 26, like the numerology of G-d's Name. In the word "כברו" the outside letters are "כו" which add up in numerology to 26, like the numerology of G-d's Name.

 It seems that the Bnei Yissachar intended that we should deal in Torah and mitzvahs for  G-d's sake both internally and externally, both on the obvious level and the hidden level. Therefore G-d's name is alluded to internally in the word "תוכו" and externally in the word "כברו".

 Shabbat Shalom!!