“You can keep it a secret…. But secrets have their own weight, and it can be a very heavy one.”

“two can keep a secret if one of them is dead.”

“Two can keep a secret if one of them is dead”

“Only two can keep a secret if one of them is dead.”

“Can you keep secrets? Can you know a thing and never say it again?”

“The man who can keep a secret may be wise, but he is not half as wise as the man with no secrets to keep.”

“That is how heavy a secret can become. It can make blood flow easier than ink.”

“It is wonderful how well men can keep secrets they have not been told.”

“I'm not very good at keeping secrets at all! If you want your secret kept do not tell me!”

“You can want one thing and have a secret wish for its opposite.”