In the book "the secret life of bees," what was sue monk kidd saying about secrets?

Sue Monk Kidd is a writer from Georgia, she wrote an amazing novel in 2002 called “The Secret Life of Bees”, in which she said about secrets, the exact words by the author are as follow:

“Every human being on the face of the earth has a steel plate in his head, but if you lie down now and then and get still as you can, it will slide open like elevator doors, letting in all the secret thoughts that have been standing around so patiently, pushing the button for a ride to the top. The real troubles in life happen when those hidden doors stay closed for too long.”

The quotation certainly weighs heavy in our times also when people are used to and sometimes forced to keep secrets for too long. 

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