" The third type of legalism adds our own rules to God’s law and treats them as divine. It is the most common and deadly form of legalism. Jesus rebuked the Pharisees at this very point, saying, “You teach human traditions as if they were the word of God.” We have no right to heap up restrictions on people where He has no stated restriction. "

― R.C. Sproul , How Can I Develop A Christian Conscience? (Crucial Questions, #15)