William Burkitt on 1 Peter 1:25

That is, the word of God, the mind of Christ, contained in, and revealed by, the gospel, shall abide and last for ever, and never be abrogated; the word of God is everlasting truth, it is so in its nature, and also in its effects upon the regenerate, it abideth for ever, and so doth their estate who are begotten again by it. The word of God is the incorruptible seed, or principle of regeneration: it is called the word of eternal life, because it brings those that love and obey it to eternal life, Joh 6:68.

Observe lastly, That the same word of God is now preached unto us which was so highly commended by the prophets, apostles, and by Christ himself: This is that word, the same word, which by the gospel is preached unto you.