The gem cannot be polished without friction, nor man perfected without trials.
Proverbs, Sayings, and Adages
Chinese proverb
Quoted in W. C. Wilson, ed., The Teacher's Visitor (1846).
The gem cannot be polished without friction, nor man perfected without trials.
Proverbs, Sayings, and Adages
Chinese proverb
Quoted in W. C. Wilson, ed., The Teacher's Visitor (1846).
