Quote from Phoebe in The One with a Chick and a Duck
Phoebe: Monica, I am so excited for you. I have to tell you something. Monica: What? Phoebe: Well, I can't tell you. Monica: But wouldn't it be easier to tell me something that you could tell me? Phoebe: Well, sure, in a perfect world. But, no, I promised I wouldn't tell, and I swore to, like, all my Gods.