I'm looking only for positive things; knowledge that has edified you, whether it was new teaching or correcting/clarifying something you thought you knew. I'll start the ball rolling with a couple things I can think of off the top of my head that I have learned here. I'll try to add more as they occur to me. 1. I learned that my gut feeling was right about the parable of the yeast and the dough, but that I was wrong about the parable of the mustard seed. I learned that both are about false teachers spreading throughout the kingdom. 2. I learned that, because of gender mismatch, I was wrong about "that" referring back to "faith" in Ephesians 2:8. It refers back to the entire phrase, "are having been saved by grace through faith".