12 “In anger the peoples You shall bring down.” You are angry and dost bring down, dost rage and save, dost terrify and call. Thou fillest with tribulations all things, in order that being set in tribulations men may fly to You, lest by pleasures and a wrong security they be seduced. From You anger is seen, but that of a father. A father is angry with a son, the despiser of his injunctions: being angry with him he boxes him, strikes, pulls the ear, drags with hand, leads to school. How many men have entered, how many men have filled the House of the Lord, in the anger of Him brought down, that is, by tribulations terrified and with faith filled? For to this end tribulation stirs up; in order to empty the vessel which is full of wickedness, so as that it may be filled with grace.
Source: The Enarrations, or Expositions, on the Psalms (New Advent)