Most Protestant scholars say Paul, as well as Jesus, taught faith alone. Most Catholic and Orthodox scholars say they both taught faith and works. I don't see anything in the teachings of Jesus to suggest faith alone, and I don't see anything in Paul that says faith and works. Those verses you quoted, while beautiful, don't say anything about salvation. They're simply suggesting Christian character and morality.
there has to be a balance between the two. Faith is important and so is works. But what is not important is the ritual observances because those things do not come from the heart.
Paul relates many fine examples of faith in people such as Noah, Abraham, Abel, Sarah etc and he points out that their faith was proved by their works.
Its Hebrews chapter 11. He mentions the works they did....Noah built an ark to save his family, Abraham traveled to a distant land to dwell in tents, Abel offered a sacrifice worth more then Cain....these were all 'works of faith'....these people proved they have faith in God by living in harmony with their faith in him.
for example, if Noah didnt really believe a flood was coming, would he have spent 40year building an ark? probably not. If Abraham didnt believe in the promise to make him a nation and give his descendents the land, would he have left his comfortable lifestyle in Ur to live in tents in the promised land? Not likely.
so you see, 'works of faith' are about how far a person is willing to go in their belief in Gods promises.
The early christians put faith in Christ and were willing to die for that faith.
While it can be debated whether or not the Mosaic law was what Jesus had in mind when he taught salvation by faith and works, that is not the way this thread has gone. The topic at hand now is whether or not Paul and Jesus were in agreement that faith and works were required for salvation, or just faith; noting that "works" may not necessarily connote obedience to the Mosaic law.
the problem is that Paul is speaking to Jews who believed they should continue to follow the mosaic law. When he said that it is not by works, he was talking about the works of the mosaic law....evidence for this is that he spoke about the 'festivals, observances and foods'
and as Jesus said
"not not enters into the mouth defiles a man, but what comes out of his mouth"
so one thing we know for sure is that Jesus didnt believe that eating shellfish or pork could make a person unrighteous...if thats the case, then Paul is telling jews that there is no reason to continue to follow a law which forbids such foods.