Knowledge transfer is critical for the success of your company. One of my managers hated the "hit by a bus" metaphor, and suggested "win the lottery" as a replacement. So if someone in your company "wins the lottery" and decides that day to quit working for you, can your organization survive?

All the tasks that that person did should be able to go to someone else. After all, a good employee is prompt, dependable, reliable, productive, efficient and replaceable. Knowledge is not something that should be kept to oneself. If that were the case, no one would know how much you know. When you share knowledge at work, it elevates the person imparting the knowledge as an expert, making you more of an asset to the company than the one who keeps his or her knowledge private.