Christ in the Bible, by A. B. Simpson (Psalms)

Christ in the Bible, by A. B. Simpson (Psalms)—part of Simpson's much larger commentary (Christ in the Bible, also available)

Excerpt - 

I. The Shepherd and His Flock

The trouble with most of us is that we try to be our own shepherds. We forget that the Lord is our Shepherd, and our business is not to trouble ourselves, but to let Him keep us, and to trust and follow Him.
(from Christ in the Bible, by A. B. Simpson. Biblesoft Formatted Electronic Database Copyright © 2015 by Biblesoft, Inc. All rights reserved.)