How do we know heaven is a true promise from God?

The certainty of heaven as God's promise rests on the integrity of His Word. Revelation 21:3-4 proclaims, 'God himself shall be with them, and be their God,' underscoring His personal commitment to His people. Furthermore, God assures us that in heaven, 'there shall be no more death, neither sorrow, nor crying.' This highlights not only the qualitative nature of life in heaven but also God's faithfulness in fulfilling His promises. As believers, we can trust that what God has revealed about heaven is secure and true, as expressed in Revelation 21:5, 'These words are true and faithful.'