ברוך אתה בבאך וברוך אתה בצאתך "Blessed are you when you enter (Be boekha), and blessed are you when you leave". Rashi says that this refers to coming into this world and leaving this world. Just as one is free of sin when he enters this world, so too, he should be free of sin when he leaves the world.
It says in Penei Dawid that the word באך (Boekha) is an acronym for the Hebrew words Bayith (home), Isha (wife) and Kelim (clothes/furniture). When a person has a beautiful home, with a beautiful wife with beautiful clothes, it gives a man satisfaction and peace of mind.
"Blessed are you when you enter (Beboekh) tells us that when a person is blessed with these three things on a daily basis, it is a blessing that the person will have peace of mind and tranquility from the confusion of the desires of the physical world.
(See Berachoth 57b. Penei Dawid, Parashath Ki Thabo)
