CCC 36

"Our holy mother, the Church, holds and teaches that God, the first principle and last end of all things, can be known with certainty from the created world by the natural light of human reason."¹¹ Vatican Council I, Dei Filius 2: DS 3004DS — Denzinger–Schönmetzer (Enchiridion Symbolorum) cf. 3026; Vatican Council II, Dei Verbum 6. Without this capacity, man would not be able to welcome God's revelation. Man has this capacity because he is created "in the image of God".¹² Cf. Gen 1:27