你会流泪不一定悲伤你会微笑不一定快乐
[nĭ huì liú lèi bù yī dìng bēi shāng nĭ huì wēi xiào bù yī dìng kuài lè]
A statement acknowledging that people's outward displays of emotion can be misleading; one might cry not from sadness or smile without feeling actual happiness. It recognizes complexity and duality in human emotions beyond simple cause-and-effect understanding.