do i feel guilty about reading what was not intended for my eyes?

Superficial to understand the journal as just a receptacle for one’s private, secret thoughts — like a confidante who is deaf, dumb and illiterate. In the journal I do not just express myself more openly than I could to any person; I create myself.
The journal is a vehicle for my sense of selfhood. It represents me as emotionally and spiritually independent. Therefore (alas) it does not simply record my actual, daily life but rather — in many cases — offers an alternative to it.
There is often a contradiction between the meaning of our actions toward a person and what we say we feel toward that person in a journal. But this does not mean that what we do is shallow, and only what we confess to ourselves is deep. Confessions, I mean sincere confessions of course, can be more shallow than actions. I am thinking now of what I read today (when I went up to 122 Bd. St-G to check for her mail) in H’s journal about me — that curt, unfair, uncharitable assessment of me which concludes by her saying that she really doesn’t like me but my passion for her is acceptable and opportune. God knows it hurts, and I feel indignant and humiliated. We rarely do know what people think of us (or, rather, think they think of us).. . .Do I feel guilty about reading what was not intended for my eyes? No. One of the main (social) functions of a journal or diary is precisely to be read furtively by other people, the people (like parents + lovers) about whom one has been cruelly honest only in the journal. Will H. ever read this?
Susan Sontag, journal entry of December 31, 1958. Via the NYT.