There are two ways to read the Bible. The one way to read the Bible is that it’s basically about you: what you have to do in order to be right with God, in which case you’ll never have a sure and certain hope, because you’ll always know you’re not quite living up. You’ll never be sure about that future. Or you can read it as all about Jesus. Every single thing is not about what you must do in order to make yourself right with God, but what he has done to make you absolutely right with God. And Jesus Christ is saying, “Unless you can read the Bible right, unless you can understand salvation by grace, you’ll never have a sure and certain hope. But once you understand it’s all about me, Jesus Christ, then you can know that you have peace. You can know that you have this future guaranteed, and you can face anything.”
The hermeneutical question about the whole Bible correlates with the question, ‘What do you think of Christ?’ … The hermeneutical center of the Bible is therefore Jesus in his being and in his saving acts – the Jesus of the gospel. … We can say that, while not all Scripture is the gospel, all Scripture is related to the gospel that is its centre. … The Bible makes a very radical idea inescapable: not only is the gospel the interpretive norm for the whole Bible, but there is an important sense in which Jesus Christ is the mediator of the meaning of everything that exists. In other words, the gospel is the hermeneutical norm for the whole of reality.
Graeme Goldsworthy from Gospel-Centered Hermenutics