How do we know God speaks to us through His Word?

The sermon highlights that God is not silent but communicates His will through His Word, delivered by prophets and ultimately through His Son, Jesus Christ. The Apostle Paul emphasizes this in 1 Thessalonians 2:13, where he notes that the Word was accepted not as the word of men but as it is in truth, the Word of God. This powerful transition from God's communication in the Old Testament to its fulfillment in Christ underscores the divine authority of the Scriptures and the seriousness with which we ought to approach God's messages.