4 These things I say to you because of the following context of the Creed, and because we say, We Believe in One God, the Father Almighty, Maker of Heaven and Earth, and of All Things Visible and Invisible; in order that we may remember that the Father of our Lord Jesus Christ is the same as He that made the heaven and the earth, and that we may make ourselves safe against the wrong paths of the godless heretics, who have dared to speak evil of the All wise Artificer of all this world, men who see with eyes of flesh, but have the eyes of their understanding blinded.
Source: Catechetical Lectures (New Advent)