本性薄凉怎知我情深
[bĕn xìng bó liáng zĕn zhī wŏ qíng shēn]
'Ben Xing Bo Liang Zen Zhi Wo Qin Shen', or 'How Can Anyone See my Deep Feeling with such a Cold Heart', reveals someone who appears apathetic but harbors very deep emotions inside, possibly because no one really understands what they feel inside.