As human beings we so easily become untrusting (Matthew 16:8-10). In the mess that is a result of your own sin or carelessness (Matthew 15:32), remember that: Jesus does not criticize you; Jesus has compassion for you; Jesus has a compulsion to help you.
The Pharisees & Sadducees wielded much earthly authority. They were characterized by: false life / hypocrisy (Luke 12:1) and false teaching (Acts 23:8). If you seek God only for what you’ll get from Him, deep down you are serving Mammon (James 4:4). Paul, in describing His journey out of legalism, shows us that it can only happen through Jesus become the only thing to us, and everything else becoming rubbish (Philippians 3:3-11).