How do we know God's promise of grace and glory is true?

The certainty of God's promise to give grace and glory stems from His nature as Lord Almighty and the Living God. In Psalm 84:11, the declaration that 'the Lord will give' signifies that what follows is indubitably true. Additionally, God’s sovereignty ensures that His purposes will not fail; as stated in Isaiah 46:10, 'My counsel shall stand, and I will do all my pleasure.' Therefore, believers can rest assured that grace and glory are part of God's unbreakable commitment to His people, confirmed through the ministry of Christ who executed the will of the Father.