Since the second edition of this book appeared in 1954, two major discoveries in the field of Aramaic studies--the Qumran texts and the Neofiti Targum--have been made available to scholars. These, along with some important publications on the subject, have made this third edition necessary. The book has been completely revised and reset and the supplementary notes of the second edition incorporated in the text; a new chapter has been added to take account of the implications of the new discoveries for previous views about the language of Jesus. Those parts of the book dealing with Acts have been revised and supplemented in the light of Dr. Max Wilcox's important book on the Semitisms of Acts; and an Appendix by Dr. Geza Vermes, Reader in Jewish Studies in Oxford, has been added containing fresh evidence for the use of the expression "son of man" in Palestinian Aramaic.