Jesus asks whether a lamp is brought into a house in order to be placed under a basket or beneath a bed. The expected answer is obvious: a lamp is placed on a stand so that its light can be useful.
Jesus in Context
A Lamp Belongs on a Lampstand
Jesus uses an ordinary household oil lamp to illustrate the absurdity of receiving light only to conceal it.
Introduction
Historical and Cultural Context
Household lamps in Roman-period Palestine were commonly small pottery vessels burning olive oil through a wick. Their light was modest by modern standards, making placement important. Elevating a lamp helped its light spread through the room.
A basket or vessel placed over the lamp would obstruct its purpose, while placing a burning oil lamp beneath household furnishings would be equally contrary to normal use.
Why It Matters
The force of Jesus' saying depends upon ordinary common sense. Light is meant to be revealed and useful. The physical household image prepares for the accompanying statement that hidden things are ultimately intended to be disclosed.