This is a pretty bold statement to make
. How do you know this? Because I like to quote the Bible? My friend without the Bible the Christian religion will be a free for all. With the Bible we could narrow it down to 30,000+ denominations.
You are absolutely right they did know the law inside out and that is why Jesus said we should do as they say but not do what they do. They were corrupting the Torah with the Talmud, and that is mixing the seeds. God hates it if we mix the seed. That is why Jesus was so outspoken about it
No he is dumbfounded because he has the knowledge of God given to him by studying the word of God and guidance from the Holy Spirit. We can't have the one without the other. Yes the Spirit will guide us but the Bible teach us that there is a false holy spirit working on earth. If you don't have the knowledge (of the Bible) you will not be able to distinguish. Jesus even said that people will be healed in his name but He will not acknowledge the person doing it. He will send him away with the words "I never knew you".
So a relationship with the Holy Spirit is important but you need knowledge to distinguish the spirits my friend. Our fight is not against flesh but against the spirits. We can be deceived in the spirit without Biblical knowledge.