What articles in calligraphy illustrate people's mental outlook with examples?

Yan Zhenqing's running script "Sacrifice to My Nephew" is a eulogy written by him in memory of my nephew who was martyred. He mourned the grief of his relatives and angrily rebuked the traitor, which formed the unique artistic style of this calligraphy work. Wang Xizhi's Preface to the Lanting Pavilion, known as "the best running script in the world", embodies a distinct natural and personality style, with a strong Wei and Jin demeanor, smooth brushwork, flying demeanor, carefree and subtle taste, giving people an unpredictable, elegant and lively aesthetic feeling, and integrating the charm of the artist's own personality with the charm of calligraphy. Practical art