This article shows the dangers in preaching of God’s word according to St. Augustine. The observations of the Bishop of Hippona are double. In the first group there are exterior dangers. Their source of origin is on the outside of the Church, from heretics and schismatics. In the second group there are internal dangers. Their source is in human dimension of the Church. Among them, according to St. Augustine, there are: preachers-mercennnaries, excessive pride of preacher, desire of human praises and honours, laziness in God’s service, giving into temptation of earthly comfort and care for worldly things.