一半是天使一半是魔鬼一半是绅士一半是流氓
[yī bàn shì tiān shĭ yī bàn shì mó guĭ yī bàn shì shēn shì yī bàn shì liú máng]
This expresses an internal dichotomy where a person considers themselves both good (angel) and bad (devil), gentle (gentleman) but also naughty (thug). It shows a dual natured identity, capable of embodying opposites at different moments or contexts.