Kenneth - Agreed that scripture is profitable Only pointing out it does not say Scripture Alone or Faith Alone. I noticed you added the words "all we need". It is this added interpretation that is not in the verse and ignores other books in the bible.
I am not adding nothing for the word itself says that the Holy Spirit will lead us in all truth, and that the truth must match what His Holy Word says. If somebody is teaching something contrary to what is in the bible then that is a person who has a false spirit in them. It says we are to test all spirits to see if they are from God, so how are we to do this?
We test them by His word and rather the spirit (person who is lead by) confesses Jesus Christ as Lord and Savior. If they do not confess Him and they teach contradictory to what He taught then they are not from God.
The scriptures were given to us to show us the proper way to walk in the faith, and the Holy Spirit was sent to guide and direct us in the proper understanding of His knowledge. To take away and say this is not true denies what the word says, and is lead into a private interpretation of scripture which is completely warned of.
The word says that scripture is not of any private interpretation because the Holy Spirit guides all true born again believers in all truth. Therefore with the Holy Spirits guidance to give you God's knowledge when you pray to Him for understanding then you can not have a private interpretation!!!