charity to cry out against the wolf (heretics and schismatics)

It is true we may speak freely of infamous, public, and notorious sinners, provided it be in the spirit of charity and compassion, and not with arrogance and presumption, nor with the complacency in the evils of others, which is always the part of a mean and abject heart. Amongst all these, the declared enemies of God and his Church, such as the ringleaders amongst heretics and schismatics, must be excepted, since it is charity to cry out against the wolf wherever he is, more especially when he is among the sheep.

http://books.google.com/books?id=d8kCAAAAQAAJ&pg=PA34&dq=introduction+devout+life&ei=CztFSauUC4K0kASat9TZDg#

--St. Francis de Sales
(Introduction to the Devout Life, part III, chap. 29)