Suppose your boss pulls you aside and tells you: "You don't have the right skills for the project."
Then suppose a different situation, where your boss tells you: "You don't have the right skills for the project, yet" or "You don't yet have the connections to make this deal happen."
The word yet makes all the difference in the world. In the first example, you feel like a dud. In the examples with "yet," you feel like you may not be ready now, but you could be in the future.
