Separatism is no excuse for tolerating the openly profane (John Owen)

Reformed Covenanter

Cancelled Commissioner
But an old opinion of the unlawfulness of separation from a Church, on the account of the mixture of wicked men in it, is made a scare-crow to frighten men from attempting the Reformation of the greatest Evils, and a covert for the composing Churches of such Members only.

John Owen, The true nature of a gospel church and its government (London: William Marshall, 1689), p. 2.