The preaching of the law produces only Pharisees. They might be Pharisees who fast twice a week, tithe their spices and cumin, and refuse to walk more than a certain amount of steps on the Sabbath. Or they might be Pharisees who give away lots of money, adopt children and go on missions trips. Either way, they are only Pharisees. Their focus is on external change while their hearts are filled with poison. They are immaculately obedient tombs.
– Greear, J.D.; Gospel: Recovering the Power that Made Christianity Revolutionary; B&H Publishing Group; Nashville, TN; Copyright 2011; Kindle Edition; page 52