The natural state of motherhood is unselfishness. When you become a mother; you are no longer the center of your own universe. You relinquish that position to your children.
Take motherhood: nobody ever thought of putting it on a moral pedestal until some brash feminists pointed out; about a century ago; that the pay is lousy and the career ladder nonexistent.
Only God Himself fully appreciates the influence of a Christian mother in the molding of character in her children.