From the saint who inspired St. Augstine to the abandon heresy

The Church of the Lord is built upon the rock of the apostles among so many dangers in the world; it therefore remains unmoved. The Church's foundation is unshakable and firm against assaults of the raging sea. Waves lash at the Church but do not shatter it. Although the elements of this world constantly beat upon the Church with crashing sounds, the Church possesses the safest harbor of salvation for all in distress.

There is a stream which flows down on God's saints like a torrent. There is also a rushing river giving joy to the heart that is at peace and makes for peace.

He who read much and understands much, receives his fill. he who is full, refreshes others. So Scripture says: "If the clouds are full, they will pour rain upon the earth."

Therefore, let your words be rivers, clean and limpid, so that you may charm the ears of people. And by the grace of your words win them over to follow your leadership. Solomon says: "The weapons of the understanding are the lips of the wise"; and in another place he says: "Let your lips be bound with wisdom." That is, let the meaning of your words shine forth, let understanding blaze out. Let no word escape your lips in vain or be uttered without depth of meaning.

from a letter by Saint Ambrose