“The man who learns but does not think is lost. The man who thinks but does not learn is in great danger.” — Confucius · Analects, 2.15
“The superior man is satisfied and composed; the mean man is always full of distress.” — Confucius · The Analects, Book VII
“Our greatest glory is not in never falling, but in rising every time we fall.” — Confucius · Widely attributed to Confucius
“He who learns but does not think is lost. He who thinks but does not learn is in great danger.” — Confucius · The Analects, Book II
“Learning without thought is labor lost; thought without learning is perilous.” — Confucius · The Analects, Book II, c. 5th century BCE