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Write down that wish and then cross it out. “You may or may not get it,” Brooks adds. “The thing is, you don’t want your limbic system to govern your ambitions.” See, pleasure comes from the limbic system of your brain. It works quickly, as this is where dopamine surges are experienced, although it does not lead to long-lasting enjoyment. Your prefrontal cortex, however, works much more slowly and logically, so that’s where you want your sources of pleasure to remain, Brooks says.