Firstly - according to John's gospel - Christ made this world; within the context of God's creation Christ made this world we inhabit.
Then later, as Jesus, he was born-into this world which he had made; and lived as a Man.
As fully divine, Jesus lived his entire life in truth. He was a perfect Man because he was fully divine, and therefore always had direct knowledge of that created-reality he encountered and always lived and acted in accordance with that perfect knowledge of created-reality.
Therefore, even as he lived as a Man, Jesus also participated directly in the divine reality which he had created.
As a Man; Jesus's life unfolded in linear sequence and from his individual perspective (just as life unfolds for each of us); but as his life unfolded Jesus always knew what he needed to know, when he needed to know it; he always knew exactly what to do, and he always did it. And (therefore) this was always Good.
The knowledge that the above is true, is the faith a Christian needs. (Faith is knowledge, not belief.)
Such faith should-not and cannot be forced-upon anybody (not by coercion nor by 'evidence'); each must achieve such understanding from-himself.
The perfection of Jesus's life is the necessary datum.
(What that perfection means, how to understand and explain that perfection of life - comprehend the nature of its goodness, is of course subject to human partiality of knowledge: an on-going project for each of us, which extends beyond the door of death.)