There is something about a closet that makes a skeleton terribly restless.
A neurosis is a secret that you don't know you are keeping.
Some secrets are meant to stay secret forever.
—Liane Moriarty in The Husband's Secret
To him that you tell your secret you resign your liberty.
Three may keep a secret, if two of them are dead.
The best way to divulge a secret is to tell someone not to say anything about it.
The first rule of life is to reveal nothing, to be exceptionally cautious in what you say, in whatever company you may find yourself. If you have a secret, you have only to whisper it to your dearest friend with the strictest injunction that it will go no further, and within half a day the story is all over town, and when you do make what would seem to be a perfectly sensible remark, you will find it reported in the most grotesque form, thus incurring no end of criticism to rebound upon you.
Trade your secrets and become who you are.
There are no secrets better kept than the secrets that everybody guesses.
Secret thoughts and open countenance will go safely over the whole world.