Luke 12:39 (KJV) states, "And this know, that if the goodman of the house had known what hour the thief would come, he would have watched, and not have suffered his house to be broken through." This verse is part of a larger passage in which Jesus is teaching his disciples about the importance of being ready for the second coming of the Son of Man.

In this verse, Jesus uses the analogy of a thief breaking into a house to emphasize the importance of being prepared and watchful at all times. The "goodman of the house" refers to the owner or head of the household, and the "thief" represents the unexpected and sudden return of Jesus. The imagery of a thief coming in the night is a common biblical metaphor for the unexpected and sudden return of Christ, as referenced in other passages such as 1 Thessalonians 5:2.

The verse conveys the idea that if the owner of the house had known when the thief was coming, he would have taken measures to protect his home and prevent the theft. Similarly, Jesus is urging his followers to be spiritually alert and prepared for his return so that they will not be caught off guard.

The underlying theme of this verse is the importance of vigilance and readiness for the return of Jesus. Throughout the New Testament, there are numerous exhortations for believers to be watchful, sober, and prepared for the coming of the Lord. This verse serves as a reminder that the exact timing of Christ's return is unknown, and therefore, it is crucial for believers to be constantly vigilant and spiritually prepared.

The context of this verse is significant in understanding its meaning. In the preceding verses, Jesus tells a parable about a servant who is left in charge of his master's household. The servant is blessed if he is found faithfully carrying out his duties when the master returns, but he will be punished if he becomes complacent and neglects his responsibilities. Jesus then uses the analogy of a thief breaking into a house to reinforce the importance of being alert and watchful for the sudden return of the Son of Man.

Symbolically, the "thief" represents the unexpected and sudden return of Jesus, while the "goodman of the house" symbolizes the believer who must be prepared for this event. The house being "broken through" signifies the potential spiritual harm and unpreparedness that can result from not being spiritually vigilant.

Overall, Luke 12:39 (KJV) carries a powerful message about the need for believers to be watchful and spiritually prepared for the return of Jesus. The analogy of the thief breaking into a house underscores the urgency and unpredictability of Christ's second coming, emphasizing the need for constant vigilance and readiness. This verse serves as a call to action for believers to remain spiritually awake and alert, continually living in a state of readiness for the imminent return of their Lord.