“Psalms are not interesting,” I remarked. “That proves you have a wicked heart; and you must pray to God to change it: to give you a new and clean one: to take away your heart of stone and give you a heart of flesh.”
– Charlotte Bronte
Jane Eyre, Chapter 4. Jane is summoned to the Reeds’ breakfast room, where she is questioned by Mr. Brocklehurst on hell, sin and the Bible. She instinctively rebels and dismisses the psalms as not interesting. He retorts by accusing her of having a heart of stone, metaphorically speaking, and commands that she pray to God to replace it with a heart of flesh.