I agree. And "who you are" is partly how you project your character and your integrity to the outside world.
To take a ridiculous extreme, if my spouse ran a cockfighting ring out of my home, I might tell him or her that "this is not who I am; I will not allow this to go on on my property" (Michael Vick, are you taking notes here?? ). Eventually, I must ACT on that boundary (that would be the "not allow" part) -- I must ENFORCE it, by asking him/her to leave. Otherwise, my boundary means nothing, and my honor is tarnished: I become the guy of whom they say "Man, I can't believe he allows that despicable stuff to go on in his own home."
A man's honor and his integrity are NOT just internal.