《淮南子·齐俗训》
只有平心静气才能正确处事办事，这就像用玉玺按印泥一样，按端正了，留下的图形是正的，按邪歪了，留下的图形也是邪歪的。
神清意平，物乃可正。若玺之抑植，正与之正，倾与之倾。
Only by being calm can one correctly deal with matters, just like using a jade seal to press on ink, if it is pressed properly, the pattern left behind is straight, if it is pressed crookedly, the pattern left behind is also crooked.