Literature Reference: 澹然无他念，虚静是吾师。—— 《夏日独直寄萧侍御》 With a serene mind and no other thoughts, emptiness and tranquility are my teachers. Source from 'Summer Solitude Sent to Xiao Shiyu'.
虚: Illusion. Idleness. Vanity.
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: Emptiness and tranquility signify a state of inner peace and clarity, a realm of self-cultivation.