How do we know that God's promises about heaven are true?

We can trust God's promises about heaven because He is faithful and has proven His word through history. Hebrews 11 emphasizes that the faithful patriarchs lived their lives looking forward to the promises of God, even without seeing their fulfillment in their lifetimes. Their faith was rooted in the assurance that God, who cannot lie, will accomplish all that He has promised. Likewise, Jesus reassured His followers in John 14 that He goes to prepare a place for them, solidifying the truth of our hope in eternal life with Him.