Concerning this salvation, the prophets sought and searched diligently, who prophesied of the grace that would come to you,
Here Peter called attention to the curiosity that the ancient prophets of the Old Testament had with reference to their own writings!  Of course, New Testament critics would find fault with a truth like this, suggesting that Peter "built" this verse on one of the statements of Jesus "reported differently"[28] in  Matthew 13:17 and  Luke 10:24!  There are plural errors in a view like this.  First, there is the denial that Jesus made both statements.  The foolish notion that similar statements in the New Testament are invariably founded upon "an original" is ridiculous.  All of the New Testament sayings of Jesus are originals!  Secondly, there is the notion that Peter had to "build" his words.  Peter's teaching in this verse could well have been founded upon the personal words of Christ, but whether this is true or not, it is given by the inspiration of the Holy Spirit, and therefore true.