‘But you did not so learn Christ.'
This is one of Paul's ‘buts' (compare Ephesians 2:4). It heralds a reference to a life transforming change. This kind of behaviour was not the kind that they had been taught about by those who brought Christ to them. They had been taught that their meeting up with Christ was life transforming. It demanded a new way of life. Others were teaching that it was good to do as you liked and so show you were free. But Paul insists that that is abhorrent to Christ, as His own teaching, known to the churches, makes clear.