Certainly, the Bible can be used as the benchmark for any post-biblical theological assertions. But how can we know that the Bible itself deserves to be this benchmark? That’s the question. Either we are able to answer it or our faith is groundless. My answer, to put it simple, comprises the following two aspects.
First of all, a Christian gets impressed (fascinated, captivated) by the image of Jesus Christ. Thus the Gospel narratives are directly convincing a believer of Jesus’ divinity and of their own reliability. But, of course, that’s not the end of the story.
One could (and probably should) match the Gospels with what it’s possible to understand about the divine creative action in nature - and to discern that it makes perfect sense: Jesus epitomizes the manner of divine creativity.
I’ve recently proposed to discuss this issue in the other thread , which is already closed. So, here I’ll just quote again Emil Brunner who has given a succinct and lucid presentation of the kenotic creation perspective: “He limits Himself by the fact that the world over against Himself is a real existence. … Now we begin to see what a large measure of self-limitation He has imposed upon Himself, and how far He has emptied Himself, in order to realize this aim, to achieve it, indeed, in a creature which has misused its creaturely freedom to such an extent as to defy God. The κένωσις, which reaches its paradoxical climax in the Cross of Christ, began with the Creation of the world.” (Brunner, Emil. 1952. Dogmatics, Vol. 2, The Christian Doctrine of Creation and Redemption. Philadelphia: The Westminster Press. 1952. P. 20).