How do we know that believers will be with Christ in heaven?

The promise that believers will be with Christ is grounded in His prayer in John 17:24 and His completed work of redemption. Christ asserts that those given to Him by the Father will be brought to glory, exemplifying the certainty of this hope. His role as the High Priest and the fulfillment of the covenant strengthens this assurance, as He prays for all His elect throughout the ages. This demonstrates not only God's sovereignty but also His unwavering commitment to bring His people into eternal fellowship with Himself.