The popular proverb
天下无难事,
只怕有心人 ('nothing is hard under heaven, only the determined person makes it so') dates at least to the Ming dynasty, appearing in colloquial literature such as the 《
西游记》 and various storyteller collections. Mao Zedong memorably reworded it in 《
水调歌头·
重上井冈山》:
世上无难事,
只要肯登攀 — 'Nothing on earth is hard, so long as one is willing to climb.'