The wisdom of hindsight, so useful to historians and indeed to authors of memoirs, is sadly denied to practising politicians.
后见之明对历史学家乃至回忆录作者非常有用，但遗憾的是，实践中的政治家却无法拥有。
Real energy solutions come from real energy sources.
译文：只要专注于眼前的事物，自然就不会有烦恼。
The only thing that matters is the work itself.