There's a interesting thing about this whole college experience. The farther and farther along you get, the more you come into contact with professors and students. And the more you come into contact with all of these very smart people, the less and less you realize you know.
It seems the end product of this is, at its core, humility.
Don't mistake this for the postmodern notion of relative truth or the inability to know any sort of ultimate or absolute truth. Rather, diving into the depths of God, reality, and the world we live in definitely brings a lot of hard and fast knowledge, but as you swim deeper and deeper into the sea of God's love, for instance, you start to see that there is whole lot more down there that you still haven't explored.
A wise man once said "the fear of the Lord is the beginning of wisdom." Later on, he wrote about how there is more hope for a fool than a man who is wise in his own eyes. Turns out that the older you get, especially in your relationship with God, the more and more true that becomes.