Charles H. Spurgeon on Psalms 23:4

"Thy rod." Of the virga pastoralis there are three uses: —1. Numerare oves —to reckon up or count the sheep; and in this sense they are said "to pass under the rod" (Leviticus 27:32), the shepherd tells them one by one. And even so are the people of God called the rod of his inheritance (Jeremiah 10:16), such as he takes special notice or account of. And take the words in this sense —"Thy rod doth comfort me" —it holds well; q.d. "Though I am in such eminent dangers by reason of evil men, yet this is my comfort —I am not neglected of thee; thou dost not suffer me to perish; thou takest notice of me; thou dost take and make an account of me; thy special care looks after me." 2. Provocare oves: when the sheep are negligent and remiss in following or driving, thew shepherd doth, with his rod, put them on, quicken their pace. And in this sense also David saith well, "Thy rod doth comfort me;" for it is a work which doth breed much joy and comfort in the hearts of God's people, when God doth put them out of a lazy, cold, formal walking, and doth, some way or other, cause them to mend their pace, to grow more active and fervent in his service and worship. 3. Revocare oves: the sheep sometimes are petulante divagantes, idly and inconsiderately straying from the flock, grazing alone, and wandering after other pastures, not considering the dangers which attend them by such a separation and wandering; and, therefore, the shepherd doth with his rod strike and fetch them in again, and so preserve them. In this sense also David might well say, "Thy rod doth comfort me;" for it is a great comfort that the Lord will not leave his sheep to the ways of discomfort, but brings them off from sinful errings and wanderings, which always do expose them to their greatest dangers and troubles. So that the words do intimate a singular part of God's gubernation or careful providence of his flock. Obadiah Sedgwick.