Chapter 6.
Of the righteous and unrighteous passion of wrath.
From almost every cause the emotion of wrath boils over, and blinds the eyes of the soul, and, bringing the deadly beam of a worse disease over the keenness of our sight, prevents us from seeing the sun of righteousness. It makes no difference whether gold plates, or lead, or what metal you please, are placed over our eyelids, the value of the metal makes no difference in our blindness.
Source: Institutes (New Advent)