All men have spiritual faculties, and have not obtained by them all needed spiritual things.

They have not in their own opinion, and surely they are competent judges of "what lies wholly in the plane of their own consciousness." In proof of the fact that mankind have not, in their own opinion, obtained all needed spiritual things by the use of their spiritual faculties, without the aid of external revelation, we appeal to all the religions of mankind, Heathen, Mohammedan, and Christian.
Every one of these appeals to revelations from God.

Every lawgiver of note professed to have communication with heaven, Zoroaster, Minos, Pythagoras, Solon, Lycurgus, Numa, Mohammed, down to the chief of the recent revolution in China.

"Whatever becomes of the real truth of these relations," says Strabo of those before his day, "_it is certain that men did believe and think them true_." If mankind has found the supply of all their spiritual wants within themselves, would they have clung in this way to the pretense of external revelations?
Is not the abundance of quack doctors conclusive proof of the existence of disease, and of the need of physicians?
Not only was the need of an external revelation of some sort acknowledged by all mankind, but the insufficiency of the pretended oracles which they enjoyed was deplored by the wisest part of them.

We never find men amidst the dim moonlight of tradition, and the light of nature, vaunting the sufficiency of their inward light; it is only amidst the full blaze of noonday Christianity that philosophers can stand up and declare that they have no need of God's teaching.