Paul's Gospel of Salvation by Faith Alone and Not Works

As we read in Galatians 3, 15 and following, I'm not going to read it entirely, just the first part of it, 15 through 18. O brethren, I speak after the manner of men, though it be but a man's covenant. Yet if it be confirmed, no man disanulleth nor added thereto. Now to Abraham and his seed...