What they obviously didn't learn was discernment, a spiritual quality that allows people to distinguish good from evil and other dichotomies. You don't need a degree to acquire discernment, you just need to be close to God. So, we are thrown back into the world of spirit, time and time again. Man's learning can only take you so far.

You also need God's wisdom and the virtues. This has be demonstrated in Christianity since the beginnings. Think of St. Paul, St. Augustine, St. Ambrose and all the Desert Fathers. They superseded the learning of the day, whether it was Greek or Roman philosophy. They all had discernment.