《旧唐书·列传·卷二十一》
有好的开端的的确很多，能够善终的却很少。难道是取得天下容易守住天下难吗？
有善始者实繁，能克终者盖寡，岂其取之易而守之难乎？
Having a good beginning are indeed many, but being able to end well are few. Is it because obtaining the world is easy while keeping the world is difficult?