St. Ambrose on Fortitude

FORTITUDE of soul, then, is not an unimportant thing, nor is it cut off from the other virtues, for it wages war in conjunction with the virtues, and alone defends the beauty of all the virtues, and guards their powers of discernment, and fights against all vices with implacable hate.

It is unconquerable as regards labours, brave to endure dangers, stern as against pleasures, hardened against allurements, to which it knows not how to lend an ear, nor, so to speak, to give a greeting. It cares not for money, and flies from avarice as from a plague that destroys all virtue.

St. John Chrysostom - A Sharp Rebuke to False Brethren

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The great Doctor of the Church gives clear instruction as to how heretics and all manner of hypocritical, sinful false brethren ought to be handled.

The meek approach is for those ignorant of the truth.

The sharp approach is for those who know the truth and rebel against it.