don't tell anyone, but ...

Ever shared something really personal with someone only to find that a few days later everyone seems to know?

"A gossip betrays a confidence,

but a trustworthy person keeps a secret."

We need to know which of our friends are trustworthy, and which are gossips.  But that begs the question:  Am I trustworthy, or do I betray my friends by passing on their secrets to other friends?