你不是不善良而是我不坦荡
[nĭ bù shì bù shàn liáng ér shì wŏ bù tăn dàng]
'It’s Not That You Are Unkind, But That I Am Not Frank Enough' indicates self-reflection, implying that conflicts or disagreements do not arise from the other's nature, but possibly from personal insufficiencies like honesty and frankness towards one another.