We often imagine honesty to be brutal, cruel. Well, it can seem that way, at least if we've been living a lie. But in reality, honesty is far gentler and more exacting-- and THAT'S really why it disturbs us.
You gotta know where you stand with people, that's why honesty is important. But beware of finding that truth out, cause it can change/damage/destroy your relationship. It'll never be the same, once you know the truth.