As we have heard so far in this series, the Galatians are choosing to return to the confinements and imprisonment of the old covenant. But, it is here - in these verses, that we reach the climax of everything Paul has said so far in this letter. Arguably, we reach the climax of the Gospel. Paul knows that the Galatians have encountered Jesus and the Spirit before, which enables him to powerfully reinforce his appeal and remind them of their experience. He appeals to their hearts, and presents them with the invitation of intimacy and adoption. Of forgiveness and inheritance. He’s saying - let’s get back to the Gospel shall we? Nothing else matters but Jesus and his Spirit.