心不狠站不稳心不动则不痛
[xīn bù hĕn zhàn bù wĕn xīn bù dòng zé bù tòng]
Roughly means: ‘Without being hard-hearted, you won’t be able to stand firm; without wavering feelings, you wouldn't get hurt’. A somewhat pessimistic saying emphasizing protection from harm by keeping a detached attitude.