I press on toward the goal to win the prize of God’s heavenly calling in Christ Jesus. — Philippians 3:14

Paul pressed toward the goal — the upward call of God in Christ Jesus. He's not talking about salvation by effort. The prize is a gift, not a wage. Christ promised the throne to those who follow Him, and the overcomer will sit with Him on His throne. John sees heaven's reward — not earned by us but prepared for us.