Pentecost +4 - Year C
Faithfulness is another name for Jesus. He was faithful in his journey with and appreciation of the presence of G*D.
Here is the NRSV version with transposed names.
Now before Jesus came, we were imprisoned and guarded under the law until Jesus would be revealed. Therefore the law was our disciplinarian until faithfulness came, so that we might be justified by Jesus. But now that Jesus has come, we are no longer subject to a disciplinarian, for in revealed faithfulness you are all children of God through Jesus. As many of you as were baptized into faithfulness have clothed yourselves with faithfulness. There is no longer Jew or Greek, there is no longer slave or free, there is no longer male and female; for all of you are one in revealed faithfulness. And if you belong to faithfulness, then you are Abraham’s offspring, heirs according to the promise.
On a quick reading, if you weren't one who had memorized this passage you might, at first reading, not note the transposition. When thinking of Jesus it is helpful to consider what you think he was faithful to. This is a more helpful way of engaging Jesus imagery than what has been said about Jesus or claimed for Jesus.