9.  We have seen the office of the Book of Job in the system of divine revelation.  Very different, but not less important, is that of the book of Psalms.  It is a collection of sacred lyrics:  that is, of poems expressive of religious feeling and adapted to the public worship of God.  In respect to subjects, the Psalms exhibit a wonderful diversity.  They cover the whole field of religious experience, and furnish to the churches an inexhaustible treasury of sacred song for all ages.  Seventy-three of the psalms are ascribed to David in their titles, and the whole book, as referred to in the New Testament, bears his name.  Of the remaining psalms, Asaph is named as the author of twelve; to the sons of Korah eleven are ascribed; to Solomon two (Psalms 72 and 127); to Moses one (Psalm 90); to Ethan one (Psalm 89).  The remaining fifty are anonymous.  Of these, some appear from their contents to have been written as late as the era of the captivity and restoration.  Some writers have referred certain psalms to the Maccabean age.  But there is nothing in the contents of these psalms which makes such a reference necessary, and we have decisive evidence that the Hebrew canon was closed long before this period.  See below, Chap. 22, No. 21.

10.  In regard to the external arrangement of the Psalms, which is generally ascribed to Ezra, and cannot be earlier than his day, they are divided in the Hebrew Bible into five books, each closing with a doxology except the last, to which, as well as to the whole collection, the final psalm serves as a doxology.

The first book contains Psalms 1-41.  Of these forty-one psalms, thirty-seven bear the name of David.  Of the remaining four, the second and tenth undoubtedly belong to him, and in all probability the first and thirty-third also.  The psalms of this book are remarkable for the predominance of the name Jehovah over Elohim, God.

The second book includes Psalms 42-72.  Of these, eighteen bear the name of David; the first eight (including Psa. 43, which is manifestly connected with the preceding psalm) are ascribed to the sons of Korah; one to Asaph (Psa. 50); one to Solomon (Psa. 72); and the remaining three are without titles.  In this book the divine name Elohim, God, greatly predominates over the name Jehovah.

The third book includes Psalms 73-89, seventeen in all.  Of these, the first eleven are ascribed to Asaph; four to the sons of Korah; one to David (Psa. 86); and one to Ethan the Ezrahite (Psa. 89).  In the psalms of Asaph the divine name Elohim, God, predominates; in the remainder of the book the name Jehovah.

The fourth book includes Psalms 90-106.  Of these seventeen psalms, only three bear titles; the ninetieth being referred to Moses, the hundred and first and hundred and third to David.  This book is therefore emphatically one of anonymous psalms, which are for the most part of a very general character, being evidently arranged with reference to the service of song in the sanctuary.  Throughout this book the divine name Jehovah prevails; the name Elohim, God, being rarely used except in connection with a pronoun or some epithet—­my God, God of Jacob, etc.