《资治通鉴·唐纪·唐纪九》
长久安定的百姓容易骄逸，骄逸则难以教化；经过动乱的百姓易于忧患，忧患则容易教化。
久安之民骄佚，骄佚则难教；经乱之民愁苦，愁苦则易化。
The people who live in prolonged peace and stability tend to become arrogant, and the arrogant ones are hard to receive moral education. The people who have experienced upheavals are prone to worry and fears, and those who worry and fear are easy to receive moral education.