Fanaticism (from the Latin adverb fānāticē (fren-fānāticus; enthusiastic, ecstatic; raging, fanatical, furious)[1]) is a belief or behavior involving uncritical zeal or with an obsessive enthusiasm. Philosopher George Santayana defines fanaticism as "redoubling your effort when you have forgotten your aim".[2] The fanatic displays very strict standards and little tolerance for contrary ideas or opinions.