The Reasoning of the Gospel

There are many times when people place faith against logic and reason. Faith, they say, is outside of logic. We walk by faith, not by sight. Perhaps this is true; but often times, we are told to think through our faith, to reason out what we are to know and how we are to act. As Paul confronts Peter, he does not ask for Peter to simply believe him, but rather to think through his faith, seek to understand the implications of what he knows is true. Here, we get to see the logic behind Paul's central conviction of vv. 15-16: we are only justified in Christ.