A secret is a trust, and to betray it is perfidy.
The least of all noble traits is to keep a secret, and the greatest is to forget it.
He controls himself most who hides a secret from his friends.
When a secret is known to more than two, it becomes public.
He who seeks a place to hide his secret reveals it.
Walls have ears.
It is unwise to confide a secret to two tongues and four ears.
Your secret is your captive, betray it and you become its captive.
A man should be a tomb in which a secret is deposited.
If you keep your secret you are safe, and it will be to your sorrow if you reveal it.