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In page Gardnerian Wicca:

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A second ethical guideline is often called the Law of Return, sometimes the Rule of Three. Like the Rede, this guideline teaches Gardnerians that whatever energy or intention one puts out into the world, whether magical or not, will return to that person "multiplied by three".[citation needed] This law is controversial, as discussed by John Coughlin, author of The Pagan Resource Guide, in an essay, "The Three-Fold Law".[2]