The Substance is of Christ - Colossians 2:16-23

 The more a heresy resembles the truth the more dangerous it is.  The error of the Judaizers of which the Apostle Paul wants the Colossians to be on their guard was dangerous just because it seemed so very spiritual and holy.  But Paul knew that it was a a doctrine that would deprive these believers of their inheritance in Christ.  Such errors are always present though they may change their character somewhat from generation to generation.  But in general the danger is always from doctrines that make men appear humble and virtuous.  The only cure for such error is the one which the Apostle here counsels, namely, cling to Christ Jesus, the Head, the Substance, the Body.