Well study's not just a matter of knowing but understanding. If you can only parrot a truth, you don't truly understand it, but if you can explain it in many ways to many people, then you understand it. By studying, you learn how to take a simple truth and apply it in many ways thereby increasing your level of understanding.

As for the pharisees, they only knew the truth in one way, had no understanding (or maturity) and then used it as a club to rob and batter others. Jesus, however, told the truth in many ways, and used it as a means to free and better others. It's a difference of ways between God and the devil. God loves people, but the devil enslaves. Jesus came to free people, but the pharisees did not.