How do we know that the promises of heaven are true?

The certainty of heaven's promises comes from the infallible word of God, wherein He declares the glories that await the faithful. Scriptures such as 1 Peter 1:4 affirm that our inheritance is kept in heaven, protected and incorruptible. Additionally, the consistent themes throughout the Bible regarding God's faithfulness and His perfect promises assure believers that what He has promised will surely come to pass. The experiences of the saints and the historical faithfulness of God's covenant throughout generations reinforce our belief in the reality of heaven and the eternal rewards.