CCC 157 Faith is certain. It is more certain than all human knowledge because it is founded on the very word of God who cannot lie. To be sure, revealed truths can seem obscure to human reason and experience, but “the certainty that the divine light gives is greater than that which the light of natural reason gives.”1 “Ten thousand difficulties do not make one doubt.”2
1 St. Thomas Aquinas, STh II-II 171, 5, obj. 3.
2 John Henry Cardinal Newman, Apologia pro vita sua (London Longman, 1878) 239.