If a cluttered desk is a sign of a cluttered mind, of what, then, is an empty desk a sign?

If a cluttered desk is a sign of a cluttered mind, of what, then, is an empty desk a sign?

如果一张杂乱的桌子是思想混乱的标志，那么一张空桌子是什么标志呢?

-- Albert Einstein 爱因斯坦