Authority

I do not believe that the Gospels are more inspired, God-breathed, or authoritative than the rest of Scripture, but I do find thought-provoking the truths that Jesus affirmed when He walked among men. For example, the inspiration of Scripture down to the "jot and tittle"; marriage between a man and a woman; resurrection--Abraham, Isaac, and Jacob are just as alive today as they ever were; Moses' authorship of the Torah; that in the days of a real person named Noah, God judged the world with a world-wide flood and that a future world-wide judgment is coming; that when the ungodly die they go to a terrible place of eternal judgment; that a man by the name of Jonah spent three days and three nights in the belly of a great fish; that the gospel is exclusive--there is only one way into the presence of the Father and that is through believing in the Son.
He also asserted that He was the Bread of Life, the Light of the world, the Good Shepherd, the True Vine, the Resurrection and the Life, and that those who believed in Him would have eternal life; that doing the work of God was to believe on Him whom God sent; that the Father motivated by love sent Jesus into the world that whoever believes in Him would not perish but have eternal life; that no one could take those who believed in Him out of His omnipotent, eternal grasp.

What I wonder is why are there those who embrace and believe those "second" set of truths and yet, refuse to believe some of the first set of truths that Jesus proclaimed? If I can't believe all that Jesus taught, how can I logically and confidently believe anything that Jesus taught? If something is true because I believe it and not true because God said it, is not my faith actually in myself and not in Him?