On Will
吾十有五而志于学
"At fifteen, I set my heart upon learning."
In "吾十有五而志于学," Confucius focuses on at fifteen, I set my heart upon learning. The exact principle is that learning becomes real only when repeated, corrected, and carried into conduct. The tension is not generic practice; it is the specific problem that knowledge stays shallow when it is consumed once and never reviewed, practiced, or taught, which still appears in after finishing one lesson, book chapter, work memo, or conversation.
Read this Confucius quote