深知你是光却不肯为我照亮
[shēn zhī nĭ shì guāng què bù kĕn wéi wŏ zhào liàng]
Deeply aware you are the light but won't illuminate for me'. It implies a situation where one knows of another's good qualities, help, guidance or influence (metaphorized as light) but laments the unwillingness of this person to extend help or concern toward them.