How do we know God is always true?

Paul asserts in Romans 3:4 that God's truth remains unchanged regardless of human belief or actions. He emphasizes that even if every person were to lie, God's nature would still affirm truth. God's faithfulness is not subject to doubt, nor does human unbelief diminish His promises. This declaration serves to highlight God's immutable character. His truth is consistent, eternal, and reliable, ensuring that every promise and word He has spoken will come to pass. The faithfulness of God is a cornerstone of the Reformed faith, asserting that His truth prevails over human reasoning or skepticism, making Him entirely dependable in promises of redemption and grace.