深海太深我不敢进人心太暗我不敢猜
[shēn hăi tài shēn wŏ bù găn jìn rén xīn tài àn wŏ bù găn cāi]
'The sea is too deep for me to enter, and the human heart is too dark for me to speculate on its intentions'. This phrase expresses the fear and caution when facing the unpredictable nature, either physical danger like the ocean or metaphorical threats, such as complex interpersonal relationships.