The Value of Reflection
13. As rain breaks through an ill-thatched house, passion will break through an unreflecting mind.
14. As rain does not break through a well-thatched house, passion will not break through a well-reflecting mind.
Sacred Books of the East, Vol. 10: The Dhammapada and Sutta Nipata,
by Max Müller and Max Fausböll, [1881], at:
http://www.sacred-texts.com/bud/sbe10/sbe1003.htm
Further reading: https://buddhismnow.com/2013/11/13/reflective-mind-by-ajahn-sumedho/