What is the seal on the plaque at the door?

Quiet and far-reaching: a calm and quiet mind is not moved by other thoughts, and quiet reflection can establish (realize) lofty goals. This sentence was first written by Liu An in the early years of the Western Han Dynasty and also quoted by Zhuge Liang in the Commandments. Huainanzi: The Training of the Master shows that the home of the master is as bright as the sun and the moon. See the world with the same eyes and listen ... 3775