The present volume is designed to serve as a companion to the third edition of the United Bible Societies Greek New Testament, edited by Kurt Aland, Matthew Black, Carlo M. Martini, Bruce M. Metzger and Allen Wikgren. One of the chief purposes of the commentary is to set forth the reason that led the Committee, or a majority of the members of the Committee, to adopt certain variant readings for inclusion in the text and to relegate certain other readings to the apparatus. On the basis a record of the voting of the Committee, as well as, for most sessions, more or less full notes of the discussions that preeded the voting, the present writer has sought to frame and express consisely (a) the main problem or problems involved in each set of variants and (b) the Committee's evaluation and resolution of those problems.