We know that the Jews were prohibited from investigating the future. The Torah and the prayers instruct them in remembrance, however. This stripped the future of its magic, to which all those succumb who turn to the soothsayers for enlightenment. This did not imply, however, that for the Jews the future turned into homogeneous empty time. For every second of time was the strait gate through which the Messiah might enter.

Note B - Theses on the Philosophy of History (1940)