And he said unto them,
Is a lamp brought to be put under a bushel, or under a bed? and not to be set on a lampstand?
Read Chapter 4
Clement Of Alexandria
AD 215
A well, when pumped regularly, produces purer water. If neglected, and no one uses it, it changes into a source of pollution. Use keeps metal brighter, but disuse produces rust. For, in a word, exercise produces a healthy condition both in souls and bodies. So “No one lights a candle and puts it under a bowl, but upon a candlestick, that it may give light.” For of what use is wisdom, if it fails to make those who hear it wise? Stromateis
"No one lighteth a candle, and putteth it under a bushel, but upon a candlestick, that it may give light to those who are regarded worthy of the feast."
Doth a candle come in, i.e, is it brought into a house, to be put under a bushel or under a bed? That it should be hidden under a vessel? No! but that it should be exposed publicly, and give light to all. Christ signified by this parable that it was not His will that the mysteries of this parable and the other doctrines of the Gospel should be concealed and hidden, but that His disciples should unfold them in their time, and communicate to others who at that time were not able to receive them. It was His will that they should publish and preach them openly. This is plain from what follows.