The Pharisees weren't teachable; you couldn't tell them anything. So many people are like that; they profess Christ but don't want to hear all that true Christianity demands. The call to self-denial, they reject. They hold high their own ideas, goals, and designs. They want to go their way, and when you try to teach the right way instead, they don't want to hear it. It's not because they're unteachable Christians; it's because they're sham Christians. The one who digs deep empties himself of self-righteousness and self-sufficiency, casts aside his own visions and experiences, and builds on the Word of God for God's glory and not his own.