Book excerpt: Recognized as a classic in the field, this book is a pioneering study dealing with the traditional rationale behind the 613 commandments, or mitzvot, in the Torah. The author draws on the considerable literature to present the interpretation of the great rabbinical thinkers on each biblical commandment throughout the ages. Excerpts from the key commentaries are given in English translation. The book provides easy reference for the student interested in the systematic study of the mitzvot and for anyone interested in additional information on a particular commandment.