A lock on your diary was the first boundary you ever set. You were right then, too.

Long before you had a word for it, you knew something true: that you have an inside, and that not everyone gets a key. A kid with a small brass lock is not being secretive or difficult. They are making the first version of a claim people spend years afterward feeling guilty about. The instinct arrived before any theory of it, which is usually a sign the instinct is sound.

Trust the old one. Pick something you have been sharing out of habit rather than because you wanted to, and keep it in this week, just to feel that the inside is still yours.