I know that people will argue things in the Bible, but the Bible was meant to be heard and not to be debated or analyzed, analysis comes when one obtains the presence of the Holy Spirit who leads and guides us acting as our Teacher.
The scripture tell us that we must accept the word of God by faith, and so believe. It tells us that through believing we obtain both salvation and the Spirit of God. This is what we learn when we do as we are told to do. However people will attempt to use all sort of intellectual means to attempt to analyze and figure out what makes one spiritual and well pleasing to God. They devise all sort of theories. They fail to hear the word of God and its point that all we have to do is believe and then we come in contact with the Spirit of God.