Who said "Some doors once opened cannot be shut"?

This quote is attributed to Davos Seaworth.

Some doors once opened cannot be shut - Davos Seaworth

"Some doors once opened cannot be shut"

Davos Seaworth

Character in A Storm of Swords

Buy "A Storm of Swords" on Amazon

"There is no creature on earth half so terrifying as a truly just man."

"Time is the greatest judge."

"The storm makes iron brittle."

"The dead do not return."