清风明月

Explanation: Only with the wind, the moon for company. Analogy is not casual acquaintances. Also be used to idle without incident. 　　Usage: Joint type; as object; analogy nothing idle 　　Source: "Appreciative Xie Hui Chuan": "those who enter my room, but the wind, on my drinker, only when the moon." 　　Examples: Jin Ma Yutang Third Degree, ~ two idlers. (Song Xiu "will cause the old church language") Thesaurus:  Cool breeze Brightness