Christians trust Christ alone for salvation, by faith, or fall short of entering His salvation. Since some Jews began to doubt salvation through faith in Jesus’ finished work of the Cross, they are encouraged rest in Him.
A heart too hard to allow God in is a rebellious heart, one that brings God’s wrath. Here are warning to those dissatisfied with Christ. Warning them of a wilderness death for abandoning Him.
Moses was so high up in the mind of the Jews in the days that Hebrews was written, that serious attention to Jesus over even Moses was necessary. Christ, sent by love, from His throne in heaven for souls on earth.
Jesus placed Himself amongst sinners by merging into humanity; finishing His work by allowing Himself to be killed for our salvation. Being without sin, He was the perfect sacrifice, both Author and doer for sinners.
God created man to rule over creation, but man’s sin interfered with God’s plans. So God sent the Savior, Jesus Christ, to restore man, and has destined redeemed sinners for glory.