Chapter 3 — Part I: The Creed — Article I: I Believe in God, the Father Almighty, Creator of Heaven and Earth
Section 8. Knowledge Of God More Easily Obtained Through Faith Than Through Reason — There is a great difference between Christian philosophy and human wisdom. The latter, guided solely by the light of nature, advances slowly by reasoning on sensible objects and effects, and only after long and laborious investigation is it able at length to contemplate with difficulty the invisible things of God, to discover and understand a First Cause and Author of all things. Christian philosophy, on the contrary, so quickens the human mind that without difficulty it pierces the heavens, and, illumined with divine light, contemplates first, the eternal source of light, and in its radiance all created things: so that we experience with the utmost pleasure of mind that we have been called, as the Prince of the Apostles says, out of darkness into his admirable light, and believing we rejoice with joy unspeakable.