One of the things he told me was about the Prodigal Son's brother.
In case you're not familiar with the story of the Prodigal Son, I'll give you a very brief overview. It's a parable in the Bible. Basically, there were two sons. The Prodigal Son demanded his inheritance early, then ran off and spent all his money on sin and indulgence. He was, in every sense of the word, rebellious. Finally, after all his money was spent, he returned home. The Prodigal's father welcomed him back home with open arms and threw a huge feast for him. He demanded only the finest be given to his son.
But the part of the story that's rarely told is about the Prodigal's brother. There's not much about him in the story - just a couple verses or so. But the Prodigal's brother was jealous of his brother's attention and exclaimed, "Why are you treating him like this when he's been such a bad son?!" - yeah, that's paraphrased.
For the first time in my life, I was suddenly able to understand.