Jesus warned His followers to "beware of the leaven of the Pharisees..." in Mark 8:15. The leaven of the Pharisee is a "religious spiirit". The main issue with this leaven is that it attempts to attain righteousness without RELATIONSHIP. Righteousness is not "doing the right things"! It is being in RIGHT RELATIONSHIP WITH THE FATHER! Simply put, the leaven of the Pharisee believes that right relationship with the Father comes through works.Righteousness is POSITIONAL & is not BEHAVIORAL. Being rightly related to the Father will take care of the behavior...you know, "wash the inside of the dish & the outside will be clean also..."