On Friday night, at the end of Lecha Dodi, we say “Bo’ee b’shalom,” — “Come in peace the Sabbath Queen,” and we turn around and look behind us.
What are we looking for? We look around to see if there is anything we might have forgotten to bring into Shabbos with us.
Some people say that in order to really be “in Shabbos,” we have to leave all our baggage outside and be a little bit Shabbosdik for a day.
This is not real. Mamesh being “in Shabbos” means that we take everything we have and bring it with us into the Holy Day.
Rabbi Shlomo Carlebach
Based on The Soul of Jerusalem