A famous maxim (preferably an ancient poem) indicating that people should be calm or concentrate.

Not cold, not awake, not quiet, not far away.

Quiet to cultivate one's morality, frugality to cultivate one's morality, not indifferent to ambition, not quiet and not far away. (Zhuge Liang) The last two sentences are the source of the idiom "indifferent to fame and fortune, quiet and far-reaching"

Meditation is specialized; Meditation leads to communication; A quiet residence is safe; Silence is familiar.