Literature Reference: 掩扉常自静，驿吏忽传呼。——《酬耿拾遗题赠》 严维 Behind closed doors, I often find tranquility, when suddenly the courier calls. From 'Chou Geng Shiyi Tizeng' by Yan Wei.
自: Nature; the true self.
静: Tranquility and serenity. It refers to the quality of remaining calm and composed in the face of challenges, exuding confidence and poise, which fosters smooth progress and prosperity in one's endeavors.
Meaning: Self-tranquility signifies inner peace and serenity, undisturbed by external distractions.