静若处子动若疯兔
[jìng ruò chŭ zi dòng ruò fēng tù]
As Quiet as a Virgin, As Active as a Mad Rabbit: The contrast between stillness and hyperactivity is strikingly depicted here. A person might adopt this to describe dual facets of themselves: calm and serene like an untouched soul while energetic or lively akin to frenetic behavior.