on secrets

Discourse transmits and produces power; it reinforces it, but also undermines and exposes it, renders it fragile and makes it possible to thwart it. In like manner, silence and secrecy are a shelter for power, anchoring its prohibitions, but they also loosen its holds and provide for relatively obscure areas of tolerance. 
-Michel Foucault

Secrets sucks. 
-Nancy R. Nangeroni

(as quoted by Mary Brown Parlee in a book The Body and Psychology, Part III, Chapter 7)

Also:
Secrets have a cost. They're not free. Not now, not ever.
-Aunt May, The Amazing Spiderman