Thirty spokes radiate from a hub.
When there is nothing in the hub,
the wheel can roll.
Turn clay to make a vessel.
When empty,
the vessel can be used.
Build a room with doors and windows.
When empty,
the room can be used as dwelling.
When there is something, it is beneficial;
When empty, it is useful.
三十輻共一轂(gǔ)，當(dāng)其無，有車之用嘉涌。
埏(shān)埴(zhí以為器罢杉，當(dāng)其無早直，有器之用丛版。
鑿戶牖(yǒu)以為室，當(dāng)其無蚤蔓，有室之用欧穴。
故有之以為利民逼，無之以為用。
