The protestant principle that one is saved by faith alone, sola fide , is sometimes defended by citing the following quotation from the Book of Romans. The difficulty with this example of biblical interpretation is that it puts a wall around the passage is if it has no relationship to the rest of the Bible.
Inspiration affirms that the Bible has one primary author, the Holy Spirit.
Therefore biblical passages must be interpreted in a manner consistent with the entire word of God. Jesus said nothing about faith. St. Paul doesn't mention repentance or baptism. The reality is that we must accept Jesus as our Lord and Savior. However, that faith obliges us to accept and obey the whole of Christ's revelation.