What does the Bible say about God's communication to humanity?

According to Hebrews 1:1-3, God has communicated with humanity in various ways throughout history, particularly through prophets. In these last days, He has spoken definitively through His Son, Jesus Christ, who is appointed heir of all things and the very means by which the worlds were created. This communicates the finality and authority of Christ's message, emphasizing that He uniquely reveals God to us and delivers the gospel of grace, indicating that through Him we know God and have eternal life.