Psalm 37/Notes/Grammar.v. 37.416537
From Psalms: Layer by Layer
v. 37a: The adjectives might modify the implied noun דֶּרֶךְ (cf. v. 34): "Keep to the blameless [way], and consider the upright [way]" (Kselman 1997, 253). The adjectives תם/תמים and ישׁר are elsewhere used to characterize pathways (e.g., תמם Pss 18:31; 101:2, 6; Job 4:6; ישׁר Ps 5:9; Prov 14:12; 16:25), and the act of "guarding" (שׁמר) can have a "pathway" as its patient (e.g., Prov 2:20) (cf. Kselman 1997, 253-254). Or, in light of the b-line, the adjectives might modify the implied noun אִישׁ: "observe the blameless [man]; look at the upright [man]" (so Rashi; Ibn Ezra). Or, the adjectives might function as abstract nouns: "observe that which is blameless [i.e., blamelessness...]" (cf. LXX).