From
诸葛亮《
诫子书》 (Zhuge Liang, 'Admonition to My Son,' c. 234 CE), the deathbed letter to his son Zhuge Zhan:
夫学须静也,
才须学也,
非学无以广才,
非志无以成学 (Study requires stillness; talent requires study. Without study there is no way to broaden one's talent; without resolve there is no way to complete one's study). One of the most-quoted self-cultivation texts in Chinese education.