The fulfillment of prophecy in Jesus can only be understood if we first understand the meaning and application of the prophetic word for its original audience. In this case, Jesus fulfills or “fills up” the word of Isaiah because He, as a Son brought forth by extraordinary means, is the sign of a greater curse or blessing depending on how we respond to the Gospel. Let us follow Him alone as Savior and Lord so that we may receive the greater blessing.
For further study:
The Bible in a year: