心若无坚不摧何必喊痛
[xīn ruò wú jiān bù cuī hé bì hăn tòng]
The expression reflects a philosophical viewpoint about not showing weakness. If one’s heart can withstand pain without breaking, there is no point in complaining. In English, it's somewhat akin to 'If one's will is unbreakable, why bother crying out in pain.'