Matthew Poole and continuators on 1 Peter 1:25

25 But the word of the Lord endureth for ever : And this is the word, which by the Gospel is preached unto you.

Not only absolutely in it self, and in respect of its perpetual Verity, Psalm 119.160. Matth. 24.35. but relatively, as received by, and dwelling in Believers, (1 Iohn 3.9.) who always experience the Effects of it in themselves in their Regeneration, receiving a solid, and lasting Being from it (the new Nature) which is likewise preserved by it, in opposition to that Flux and mutable Being they had by their first Birth.

This Word, of which Isaiah speaks, and which he so much magnifies, is the very same Word of the Gospel, which is preached unto you by us Apostles.