Youth's lack of familiarity with life make them resolute—but in the sense of a fool’s fixed stability.

 The extremities of youth come from their “testing” of the world. For they are only just beginning to see it and want to uncover how it works. If they are fanatical, it is because they have not yet learned that everything lacks foundation; if they are romantic, it is because their belief in love has not yet burned out; and even their rebellion is still more an external performance than an inner dissatisfaction. For now. Because these things mostly change with time. The inexperience of the young and their lack of familiarity with life make them resolute—but in the sense of a fool’s fixed stability.