Sarcasm is cloaked aggression. That is a sin.
Does the Bible state It is the sole or final authority of Christianity? No. Neither this statement nor anything even close to it appears anywhere in the New Testament. In fact, Christ said that the Church is to resolve disputes among Christians, not Scripture (Matthew 18:17).
There is no dispute on my part. The Bible tells us all that we need to know in order to be saved. To say otherwise is to insist that Christs’ sacrifice was not enough.