The ideas of mankind concerning God, the true worship of God, and God’s will, are altogether stark blindness and darkness. For the light of human wisdom, reason, and understanding, which alone is given to man, comprehends only what is good and profitable outwardly. And although we see that the heathen philosophers now and then discoursed touching God and his wisdom very pertinently, so that some have made prophets of Socrates, of Xenophon, of Plato, etc., yet, because they knew not that God sent his Son Christ to save sinners, such fair, glorious, and wise-seeming speeches and disputations are nothing but mere blindness and ignorance.

–Martin Luther