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In other words, we are to make efforts to stay healthy and fully alert in our walk with God. We are not to simply keep one eye open spiritually, but be fully awake, completely committed to serving Christ.
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This means we must be prepared for Christ's coming, both in believing in Him (as the Thessalonian believers already had) and by living a godly life. Paul offered three commands in his response. In contrast, Paul commanded his readers, "So then let us not sleep, as others do, but let us keep awake and be sober" (1 Thessalonians 5:6). Even when a person was home, a thief could quietly enter and commit a crime without being seen. During a time when a home was empty, he could enter and remove items without being detected. Instead, he would commit his crime in the cover of darkness where his identity could be concealed. A thief did not generally operate in the daytime since he could be seen. The analogy of a thief in the night was a common one in Paul's culture. Instead, Jesus would return at any moment, unexpectedly like a thief in the night. Verse 1 notes, "Now concerning the times and the seasons, brothers, you have no need to have anything written to you." Paul had just noted that his readers did not need information about the exact time or season Jesus would return. The previous context helps answer this question. In 1 Thessalonians 5:2 Paul writes, "For you yourselves are fully aware that the day of the Lord will come like a thief in the night." What does this mean? Jesus will return like a thief in the night, what does that mean?
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