贝多芬的痛苦没人能知
[bèi duō fēn de tòng kŭ méi rén néng zhī]
'No one understands Beethoven's pain'. Beethoven is a renowned composer known for his masterpieces and suffering deafness later in life. This nickname suggests profound loneliness or the belief that no one can comprehend one’s struggles fully, perhaps echoing the hardships endured similarly to Beethoven.