The task of the Christian is to be a follower of Christ rather than an admirer. The admirer looks from a distance and sings praises. The follower seeks to be what he admirers. Following entails commitment and suffering. Admiration usually is profitable.
Christian faith requires vigor and understanding.
The modern expressions of Christian faith are dull and stupid. Ultimately faith is heroic and requires individual sacrifice. He died in 1974. This distinction means that his efforts were to distill the theology of the Bible. Questions that a Biblical theologian might address are the theological differences between Luke and Mark, or is Paul's theology different than Peter, etc.