Even Christ's own disciples at the first rather admired than perfectly understood their Lord. It is said of Christ, Luke 24:45, a little before his ascension into heaven, Then opened he their understanding, that they might understand the Scripture. The disciples did not distinctly understand many things till after Christ's resurrection from the dead, when they saw the things accomplished, and when Christ further opened their eyes; which was also further done when the Holy Ghost came upon them in the days of Pentecost. Thus we hear for the time to come; and the seed which lieth a long time under the clods, at last springeth up through the influence of heaven upon it. And they believed the Scripture, and the word which Jesus had said; the disciples then more clearly and more firmly believed the Scriptures, and were able to make a clearer application and interpretation of them. By the Scripture here, are meant the Scriptures of the Old Testament; to which is added, and the word which Jesus had said. Christ's words gave them a clearer insight into the Scriptures of the Old Testament; and the harmony of the writings of the Old Testament with Christ's words under the New Testament, confirmed the disciples faith in both.
Related Commentaries of John 2:22
John 2:22
22 When therefore he was risen from the dead, his disciples remembered that he had said this unto them; and they believed the scripture, and the word which Jesus had said.