J.I. Packer, On the Truthfulness of God

“The words of human beings are unstable things. But not so the words of God. They stand forever, as abidingly valid expressions of his mid and thought. No circumstances prompt him to recall them; no changes in his own thinking require him to amend them. Isaiah writes, ‘All flesh is grass…The grass withers…But the word of our God will stand forever’ (Isa 40:6-8 RSV). Similarly, the psalmist says, ‘Your word, O LORD, is eternal; it stands firm in the heavens…All your commands are true…You established them to last forever’ (Ps 119:89, 151-152).

“The word translated true in the last verse carries with it the idea of stability. When we read our Bibles, therefore, we need to remember that God still stands behind all the promises, and demands, and statements of purpose, and words of warning, that are there addressed to New Testament believers. These are not relics of a bygone age, but an eternally valid revelation of the mind of God toward his people in all generations, so long as this world lasts. As our Lord Himself has told us, ‘The Scriptures cannot be broken’ (John 10:35). Nothing can annul God’s eternal truth.” (J.I. Packer, Knowing God)