Pastors and indiscreet speech

From today's Office of Readings from the Pastoral Guide of Pope St. Gregory the Great:

A spiritual guide should be silent when discretion requires and speak when words are of service. Otherwise he may say what he should not or be silent when he should speak. Indiscreet speech may lead men into error and an imprudent silence may leave in error those who could have been taught. Pastors who lack foresight hesitate to say openly what is right because they fear losing the favor of men. As the voice of truth tells us, such leaders are not zealous pastors who protect their flocks, rather they are like mercenaries who flee by taking refuge in silence when the wolf appears.