That is the end of the parable of the talents. Jesus is telling a story that illustrates a point about taking what one is given and building on it. The last line you quoted is dealing with the nobleman's response to the servant who kept the talent given him laid up in a napkin. Context, context, context!
Luke 19
11 And as they heard these things, he added and spake a parable, because he was nigh to Jerusalem, and because they thought that the kingdom of God should immediately appear.
12 He said therefore, A certain nobleman went into a far country to receive for himself a kingdom, and to return.



