Yùndòngyuán shēnzhī yèjīngyúqínhuāngyúxī de dàolǐ, měitiān dōu kèkǔ xùnliàn.
Athletes know well 'skill is honed by diligence, wrecked by play,' and train hard every day.
Tips
history
From 韩愈's 《进学解》 ('Explanation of Learning's Advance', middle Tang, c. 803 CE): 业精于勤，荒于嬉；行成于思，毁于随 (work is perfected through diligence and ruined through idle play; conduct is formed through reflection and destroyed through drift). Han Yu frames the essay as a teacher addressing his students; it became a standard text for exam candidates for over a thousand years.
usage
Almost always quoted with the follow-up 行成于思毁于随. 于 here is the classical 'by / through' particle. 嬉 = ('to play / frolic'). Used in classrooms, op-eds, and motivational writing everywhere.
