Hebrews 10:7

Lo, I come Rather, "I am come." This 40th Psalm is one of the special Psalms for Good Friday.

in the volume of the book The word kephalis, here rendered volume, does not occur elsewhere in the N. T. It means the knob (umbilicus) of the roller on which the vellum was rolled. The word in the Hebrew is Megillah, "a roll." It cannot be rendered "in the chief part" or "in the beginning." The words "it is written of me" may mean in the Hebrew "it has been prescribed to me," and others take the clause to mean "l am come with the roll of the book which is written for me." If we ask whatwas "the book" to which the author of the Psalm referredthe answer is not easy; it may have been the Law, or the Book of God's unwritten counsels, as in Psalms 139:16. The writer of the Epistle, transferring and applying David's words to Christ, thought doubtless of the whole O.T. (comp. Luke 24:26-27, "He expounded unto them in all the Scripturesthe things concerning Himself).

to do thy will The writer has omitted the words "I delight." Slavish accuracy in quotation is never aimed at by the sacred writers, because they had no letter-worshipping theory of verbal inspiration. They held that the inspiration lay in the sense and in the thoughts of Scripture, not in its ipsissima verba. Hence they often consider it sufficient to give the general tendency of a passage, and frequently vary from the exact words.