Why did Jesus do all His miracles and all His preaching and teaching?

Jesus performed all His miracles and all His preaching and teaching to prove to the Jewish people of His day that He was the promised Messiah. This was the whole scope of His ministry, confirming that He was the Anointed One, the Christ.

Les emphasizes that as we come through the Gospels, the reason for all of Christ's miracles and all of His preaching and teaching was to prove to the Jew of His day that He was that promised Messiah. This, Les says, is the whole scope of His ministry. The context explains that the King Israel awaited is the Anointed One or Messiah, and the Greek word for Messiah is Christ, so Jesus Christ means Jesus the Messiah. He comes out of the Old Testament promises and the covenant God made with Israel.

Why did Jesus perform miracles, preach, and teach?

Jesus performed miracles, preached, and taught to prove to the Jewish people of His day that He was the promised Messiah. This was the whole scope of His earthly ministry, confirming that He was the fulfillment of Old Testament promises.