“So beginning with this same Scripture, Philip told him the Good News about Jesus” (Acts 8:35 NLT).

CHRIST IS THE SUBJECT AND STANDARD OF SCRIPTURE
When the Ethiopian eunuch asked Philip about the identity of the subject in Isaiah 53, he “told him the Good News about Jesus.” Isn’t this how every Scripture should be considered? Look for Christ. For the Scripture always points us ultimately to Christ. As Jesus said, “You search the Scriptures because you think that in them you have eternal life; and it is they that bear witness about me… For if you believed Moses, you would believe me; for he wrote of me” (John 5:39, 46).
 
Philip knew this. So, with the eunuch, he began with Isaiah and preached Christ. Yet, he could have begun anywhere in Scripture. For Christ is both the subject to which all Scripture points and the standard by which all Scripture is understood.