I think the best way to keep a secret is to pretend there isn’t one.

A wry observation about secrecy: acting as though nothing is being hidden can reduce attention and suspicion, making it easier for a secret to remain undiscovered.

The line suggests that secrecy is often compromised by guarded behavior. By behaving normally and not signaling that something is being concealed, a person may avoid prompting others to probe or gossip.