If you take a few moments to read the conversations that were taking place just prior to these verses, you can see that Jesus told His disciples several things that clearly troubled them. At the Last Supper, Jesus washed their feet, and in some ways, I think this act of humility from their leader seemed embarrassing and disturbing to them. Then, during the meal, Jesus revealed that one of them was about to betray Him. Soon after, Jesus also made it clear to Peter that Peter would deny Him. He also made it clear that He was going somewhere, and they wouldn't be able to come with Him.