accidents will happen in the best regulated families

proverb Mishaps and setbacks are just a natural and inevitable part of life. This phrase is often said in an attempt to comfort someone after an accident has happened. I know that accidents will happen in the best regulated families, but I still can't believe he backed into my car! Oh, it's all right, accidents will happen in the best regulated families. This was just a $10 vase anyway, not some priceless heirloom! I know you didn't mean to spill your juice, sweetheart—accidents will happen in the best regulated families.