心如止水

Explanation: Described the peace of mind, no distractions. 　　Source: Bai Tang, "offering Lishi Lang Man" vast world way, with non-rail; teeth relative to rolling, waves everywhere. Public and independent person, Xinruzhishui; wind and rain, such as dark, crowing incessantly. " 　　Examples: Repeated the situation changed, she is already ~, Furui no waves. Thesaurus:  Heart, such as old well