Why is it that we call it a "Bar" Mitzvah - literally a "son of a mitzvah", as opposed to a sinner who we call a "Ba'al" Aveira? Why don't we call a sinner a "Bar" Aveira too?
Answered the holy Chofetz Chaim:
"Baal" in lashon hakodesh can also mean a husband. A husband can get rid of his wife by granting her a divorce.
So too, we can get rid of an aveira by divorcing it, through Teshuvah.
On the other hand, a son can never ever be divorced from his father.
The same goes for a Mitzvah. When we do a Mitzva, we strengthen the relationship we have to our Father in Heaven. And we are always a "bar mitzvah", we can never get rid of the closeness that we created when we did a Mitzvah.
Warmest and Heartiest Mazal Tov!!!!
May the Bar Mitzvah Bachur grow up to be a true "Bar Mitzvah" and become a great mezakeh es harabim like his father!!! Amen
Fiery burning love from,
Noorah, the smallest in the house of Amram.