A short poem with shepherd imagery, first-person suffixes, and the parallelism typical of biblical verse.
מִזְמוֹר לְדָוִד is a superscription. יְהוָה רֹעִי is a nominal clause: "the LORD is my shepherd." לֹא אֶחְסָר is imperfect: "I shall not lack." The suffix on רֹעִי is the whole metaphor.
psalm, melody
Ps 23:1of David
Ps 23:1my shepherd
Ps 23:1I will lack
Ps 23:1Construct pairs: pastures of grass, waters of rest. The verbs are imperfect with 1cs suffixes: he makes me lie down, he leads me. English past tense in many translations is a choice, not a Hebrew perfect.
grass, young herbage
Ps 23:2resting places
Ps 23:2he leads me
Ps 23:2Lines come in pairs. Do not flatten every verb to a single English tense before you have heard the parallel. The poetic accent system also differs from Torah prose.
Biblical verse leans on matching lines, not on end-rhyme. Psalms, prophets, and wisdom books all use it.
Deuteronomy 6:4–5 is short, liturgical, and packed with suffixes, construct, and the name of God.
Several divine names and titles run through the Tanakh. Jewish reading treats the four-letter name with care.