Psalms 23:1

From three very comfortable premises David, in this psalm, draws three very comfortable conclusions, and teaches us to do so too. We are saved by hope, and that hope will not make us ashamed, because it is well grounded. It is the duty of Christians to encourage themselves in the Lord their God; and we are here directed to take that encouragement both from the relation wherein he stands to us and from the experience we have had of his goodness according to that relation. I. From God's being his shepherd he infers that he shall not want anything that is good for him, Psa 23:1. See here, 1. The great care that God takes of believers. He is their shepherd, and they may call him so. Time was when David was himself a shepherd; he was taken from following the ewes great with young (Psa 78:70, Psa 78:71), and so he knew by experience the cares and tender affections of a good shepherd towards his flock. He remembered what need they had of a shepherd, and what a kindness it was to them to have one that was skilful and faithful; he once ventured his life to rescue a lamb. By this therefore he illustrates God's care of his people; and to this our Saviour seems to refer when he says, I am the shepherd of the sheep; the good shepherd, Joh 10:11.

— Matthew Henry's Concise Commentary (public domain)