Luke 17:24 Meaning: As the Lightning, So Will the Son of Man Be
for as the lightning, when it flashes out of one part under the sky, shines to another part under the sky, so will the Son of Man be in his day.
For as the lightning, that lighteneth out of the one part under heaven, shineth unto the other part under heaven; so shall also the Son of man be in his day.
for as the lightning, when it lighteneth out of the one part under the heaven, shineth unto the other part under heaven; so shall the Son of man be in his day.
for as the lightning that is lightening out of the one part under heaven, to the other part under heaven doth shine, so shall be also the Son of Man in his day;
For as the lightning shines which lightens from [one end] under heaven to [the other end] under heaven, thus shall the Son of man be in his day.
Meaning in one sentence
Jesus says his coming will be as sudden and visible as lightning. What this means for how we live today, without chasing false signs.
Context
Jesus had just told the Pharisees that God's Kingdom does not arrive with obvious signs you can observe, it is already among them. Now he turns to his disciples and warns them not to be fooled by people claiming, 'Look, here is the Messiah!' or 'Look, there!' The reason he gives is simple: when the Son of Man is revealed, no one will need to point it out. It will be as impossible to miss as lightning that splits the sky from one horizon to the other. Yet Jesus adds a sobering note: before that day, he must suffer many things and be rejected. The surrounding verses mention the days of Noah and Lot, showing that judgment comes suddenly while people go about ordinary life. Many Christians see this chapter holding together two events, the destruction of Jerusalem and Christ's final return, both arriving publicly and unmistakably.
Key Words
The word for lightning here is astrapē. It means a bright flash of light, used elsewhere for the dazzling clothes of angels (Luke 24:4). Not a faint glimmer, something that commands attention. The verb flashes (astraptousa) is in a form that pictures the lightning in the act of flashing, as if you are seeing it happen. And his day uses hēmera, the same word for 'day of the Lord' in the prophets, a time of revelation and decision. Jesus calls it his day, tying it directly to himself. Together these words paint a clear picture: the Son of Man will not arrive in secret, to be found only by the spiritually alert. His coming will be as obvious as a lightning bolt that fills the whole sky. You will not need to search for him. You will simply see him.
How Christians Read This Verse
Christians have understood this lightning simile in different ways, while agreeing on its main point. Some, like Matthew Henry and the Jamieson-Fausset-Brown commentary, see a partial fulfillment in the destruction of Jerusalem in AD 70. The end of the old covenant system, they say, was as unmistakable as lightning to those with eyes to see. Others, like Wesley and many evangelical traditions, read it primarily as the final coming of Christ at the end of the age. The Cambridge Bible notes that lightning is 'bright, swift, sudden, universal, irresistible.' Historic Christian teaching holds that Christ will return visibly and bodily. Whether in judgment on Jerusalem or at the last day, the key truth remains: his coming will be public, sudden, and impossible to mistake.
A common misunderstanding
Some readers think this verse means Christ's coming will be secret or hidden, visible only to believers. In fact, the lightning simile stresses the opposite. Lightning does not shine in one corner of the sky, it lights up the whole expanse. Jesus is saying his return will be universally visible. No one will need to be told where to look. The warning against false Christs makes sense precisely because the real coming will need no announcement.
Living This Out
The lightning simile takes the pressure off you. You do not have to master prophecy charts or worry that you will miss the moment. When Jesus returns, you will know. What he asks of you this week is simpler: live ready. The days of Noah and Lot show people eating, drinking, marrying, buying, selling, ordinary things. The problem was not the activities but the unawareness. So go ahead and live your ordinary days, but keep your heart soft toward God. Is there a quiet obedience you have been putting off? A habit of prayer you have neglected? That is your preparation. Trust that when his day comes, it will be as clear as lightning.
Main takeaway: When Jesus returns, his coming will be as obvious as lightning filling the whole sky, no one will need to point him out.
For Families
For ages 5, 8
Jesus said his coming will be like lightning. Lightning fills the whole sky so everyone can see it. When Jesus comes back, everyone will know it.
For ages 9, 12
Have you ever seen a lightning flash light up the whole sky? That is what Jesus says his return will be like, sudden and impossible to miss. But before he returns, he says we have work to do. Just like Noah and Lot, we live ordinary days, but we stay ready by trusting and obeying God. You do not need to guess the date. Just follow Jesus today.
Questions People Ask
Does 'lightning' in Luke 17:24 mean Jesus will come as a literal lightning bolt?
No. Jesus is making a comparison, not describing the form of his coming. The point is how visible and sudden it will be, just as lightning lights up the whole sky at once.
What does 'his day' mean in this verse?
His day refers to the time when the Son of Man is revealed in glory. It includes his coming in judgment, both the destruction of Jerusalem in AD 70 and the final judgment at the end of the age, which the New Testament often calls 'the day of the Lord.'
If Jesus says his coming will be sudden and visible, why does he warn against false messiahs?
The warning shows that before the real coming, there will be impostors claiming to be the Christ. But the true coming will need no announcement, it will be as obvious as lightning. So do not be fooled by secret claims or hidden appearances.
Does this verse mean we should not look for any signs of Jesus' return?
Jesus gives signs elsewhere, such as wars and earthquakes. But here he emphasizes that his coming will be unmistakable when it happens. The main point is to stay ready, not to try to predict the date.
How does the destruction of Jerusalem relate to this verse?
Many Christians see the fall of Jerusalem in AD 70 as a foreshadowing of the final judgment. It was a public, unmistakable event that ended the old covenant age and pointed ahead to Christ's ultimate return.
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