Given from the Catholic Broadcasting Station 2SM Sydney Australia
Choose a topic from Vol 1:
Natural religion is simply the religion a man would be obliged to practice, even if he never received a revelation from God. Man could know by reason alone that there is a God and that He must be acknowledged by a worship dictated by reason as to its form, and by obedience to the natural moral law as manifested by conscience. But this natural religion is not sufficient in the present condition of the human race. God has given to mankind a supernatural destiny higher than any merely natural destiny, and this requires the revelation of a knowledge higher than that which could be attained by the merely natural reason.