Abstract The Zen of python does a perfect job succinctly capturing guiding principles for developing via 19 aphorisms. This is the zen of writing security rules, for fostering high-quality, high-efficacy rules as simply as possible. The Zen of Security Rules almost all points from the Zen of Python are applicable to security rules - start there favor inclusion-by-exception over exclusion-by-exception, or else endure perpetual whack-a-mole have a propensity towards performance; expensive rules...