How do we know Christ's promises are true?

In John 14, Jesus reassures His disciples of the truth of His promises. He states, 'If it were not so, I would have told you' (John 14:2), affirming that He speaks in accordance with God’s truth. The assurance that He goes to prepare a place emphasizes His role as the appointed Redeemer, fulfilling the scriptural prophecies concerning His mission. Believing that Christ has declared these truths allows believers to trust that they will indeed come to pass.

Moreover, the theological foundation for believing in Christ's promises lies in the doctrine of election and divine sovereignty. Ephesians 1:4-5 speaks to God's choice of His people before the foundation of the world, and this foreknowledge allows us to trust in His faithfulness. When Christ promises that He will come again and take His own to Himself (John 14:3), believers can stand firmly on the assurance that God does not lie and always fulfills His covenants. Therefore, the veracity of Christ's promises is intrinsically linked to His character as faithful and trustworthy.