How do we know that the day of the Lord will come?

The certainty of the day of the Lord is rooted in the authoritative word of Scripture. The Apostle Paul, influenced by the Holy Spirit, assures believers in 1 Thessalonians 5:1-3 that they are aware of this impending event. Various passages throughout the Bible affirm that the Lord's return will occur at a predetermined time, known only to God, as indicated in Matthew 24:36. Moreover, the example of the days of Noah serves as a solemn reminder that, despite continued warnings and the reality of divine judgment, many will remain indifferent to the truth until it is too late. The Bible emphasizes the necessity for believers to watch and be vigilant, as articulated in Revelation 16:15, which states, 'Blessed is he that watcheth.'