This is a study of a group of terms which have a central importance in the New Testament. It is well known that dikaiosune and its cognates have a wide range of related but separable meanings; their correct interpretation in particular contexts can significantly affect the understanding of Christian concepts of justification, forgiveness and moral regeneration. Dr Ziesler has examined in detail the use of these terms in the New Testament and has provided entensive comparative material from Qumran writings, rabbinical sources and hellenistic Greek. This study will be of interest to all New Testament scholars.