Hebrews 4:1–13 highlights how we respond to Christ, drawing from Psalm 95 to warn against the danger of hardening our hearts. The psalm, originally directed at the generation of Israelites who refused to enter the Promised Land, reminds us that the Holy Spirit is still speaking today—not just once in the past. Their failure, rooted in unbelief, serves as a warning for all believers. An unbelieving heart turns away from the living God, and the only safeguard is daily encouragement and a steadfast faith. True participation in Christ is shown by holding firmly to our original confidence all the way to the end; perseverance is the evidence of genuine faith. The passage also unfolds the meaning of God’s rest—not simply entering Canaan, but a deeper spiritual rest marked by trust, peace, and worship, as one fellowships with God. This rest, symbolized by the Sabbath, is both a present reality and a future promise. Those who enter it, cease from their striving, just as God rested from His creative work. Yet this rest must be diligently pursued, and the danger of disobedience remains real. The section closes by pointing to the piercing power of God’s Word, which exposes every thought and motive of the heart. Nothing is hidden from Him, and all must ultimately give account before the One who sees all.