uprightness - rather, “is direct,” that is, is directed by God to a prosperous issue, however many be their afflictions in the meantime (as in the case of the Jewish exiles); the context requires this sense (Psa 34:19; Pro 3:6; Pro 11:5), [Maurer]: thus “way” means God’s dealings with the righteous (Psa 37:23).
most upright - (Deu 32:4).
dost weigh - (1Sa 2:3; Pro 5:21). Rather, “thou dost make plain and level” [Maurer], removing all obstacles (Isa 40:3, Isa 40:4).