观今宜鉴古

Explanation: Should be: should; Kam: mirror. Looking at today's society, should be reference to the ancient as a mirror. 　　Source: "Zengguangxianwen": "this should Kam ancient concept, no ancient not a today." 　　Examples: Young generations, but also the historical experience from the absorption of these with some '~' of the lesson. (Lee VI, such as "Six years of change preface")