Wo können, wo dürfen, wo wollen wir hin?

Where can we go, where are we allowed to go, and where will we be going?

This is from the opening of a speech by Rene Mayrhofer on his PhD graduation ceremony. Apart from the speech itself and his research work (which are interesting as well), it strike me as an interesting way of looking at the horizon when you are trying to set goals for your work (research or other). Its about knowing your ambition and weighing your limits.