“Jesus’ beliefs, therefore, remained those of a first-century Jew, committed to the coming kingdom of Israel’s god. He did not waver in his loyalty to Jewish doctrine. But his beliefs were those of a first-century Jew who believed that the kingdom was coming in and through his own work. His loyalty to Israel’s cherished beliefs therefore took the form of critique and renovation from within; of challenge to traditions and institutions whose true purpose, he believed (like prophets long before, and radicals in his own day), had been grievously corrupted and distorted; and of new proposals which, though without precedent, were never mere innovation. They always claimed the high ground: fulfillment, completion, consummation.
We can summarize Jesus’ beliefs in terms of the three most fundamental Jewish beliefs: monotheis, election, and eschatology.
Jesus believed that there was one God who made the world, and who had called Israel to be his people; that this one God had promised to be with his people, and guide them to their destiny, their new exodus; that his presence, guidance and ultimately salvation were symbolized, brought into reality, in and through Temple, Torah, Wisdom, Word and Spirit. He was a first-century Jewish monotheist.”
(N.T. Wright, Jesus And The Victory Of God, p. 652)