While the scripture is good and true and useful Jesus didn't make a promise that scripture would guide us to truth. Notice how many people know the scripture but don't know truth (see 2 Timothy 3:7). When you ignore the living God, who lives in you, in favor of the scriptures and/or various preachers & teachers you will be led into lies that twist the scriptures into a lifeless religious prison.
Don't trust the bible more than you trust the living God. If you do then you will end up only being certain about your interpretation of scripture. When you are certain yet wrong your life will be miserable. This misplaced or imbalanced trust closes your heart to God bringing you the truth. Being sure is not the same thing as being assured by God.
"You don't need anyone to teach you what is true. The Spirit teaches you everything you need to know" (1 John 2:27).