Jesus concluded his final discourse with his disciples before his death in John 16:12-33. He developed previous lessons and added that they would have temporary sorrow that would change into lasting joy. In spite of our suffering in this world, Christians can have joy, peace, and courage, because Jesus has overcome the world.
Once Jesus ascended on high, he sent the Father's promised Spirit to light up the church and empower her for her mission.
While David used desperate and even deceptive means of escape, God provided for him because of his grace and faithfulness.
Not only are believers in Jesus justified before God, but we also have peace, grace, hope, love, reconciliation, and salvation.