One of my favourite devotional books is Daily Strength for Daily Needs, compiled by Mary Wilder Tileston (1843-1934).  Each day’s offerings consist of a Scripture verse and one or two literary selections from well-known, anonymous, or unrenown contributors (one such precious example is “a poor Methodist Woman, 18th century.”)
Today’s excerpt on Psalm 23 is from the April 8th entry, quoting Mrs. Hannah Whithall Smith:
“The Lord is my Shepherd; I shall not want.” Psalm 23:1
“Who is it that is your shepherd? The Lord!
Oh, my friends, what a wonderful announcement! The Lord God of heaven and earth, the almighty Creator of all things, He who holds the universe in His hand as thou it were a very little thing,
HE is your Shepherd, and has charged Himself with the care and keeping of you, as a shepherd is charged with the care and keeping of his sheep.
If you hearts could really take in this thought, you would never have a fear or care again; for with such a shepherd, how could it be possible for you ever to want [lack] any good thing?”
 Mary W. Tileston, Daily Strength for Daily Needs. Little, Brown and Company, Boston. 1961. pg. 99.