'If not now, when?' Hillel, Pirke Avot, I 14. The text edition which I hereby submit to the reader has been my constant companion for much of the last nine odd years. But the relative stability of my main preoccupation contrasted sharply with my wanderings during this same span of time. In fact, for most of it I was more or less constantly on the move, trekking from the Nether lands to Australia and back again, then to the United States, with three excursioru; to Indonesia. On all these trips I carried my notes and kept working on this project, the conclusion of which continued to elude me....