A question in regard to which Bolzano adopted an especially interesting position was the problem of miracles. According to the traditional view, they are supernatural events or even immediate effects of God. Sometimes this is understood in the sense that miracles are events which are not explainable by means of the laws of nature or even incompatible with these laws. This view, however, has to face serious problems as Bolzano has painfully made clear (cf. RW I, 422–439, especially 424–436). Bolz