First you get your Bachelor's Degree, and you think you know everything. Then you get your Master's Degree, and you realize you don't know anything. Finally, you get your Doctorate, and you realize that nobody knows anything.
Finding those patterns between disciplines is always a delight--there is a surprising amount of crossover between many fields of study and human behavior. Programming was where I first found that humility is very positively correlated with competence, and the same principle shows up in a lot of other places.