Oprah's magazine this month focused on this question. Apparently, someone asked this to her long ago, catching her off guard. Now she asks the question of others, and featured some of the responses in the magazine.
What do I know is true?
I am a mom.
I am a teacher, although I may not be the greatest at it.
I have a messy house that will never be clean enough.
I have a great husband, on whom I can rely for anything.
I have the love and support of my parents.
I have two friends on whom I can always rely.
I get frustrated very easily and can lose interest/focus because of it.
I am a struggling work in progress.