Roma 1:17

1:17 For the righteousness ¹  of God is revealed in the gospel ²  from faith to faith, ³  just as it is written, “The righteous by faith will live.” ⁴ 

Roma 9:30

Israel’s Rejection Culpable

9:30 What shall we say then? – that the Gentiles who did not pursue righteousness obtained it, that is, a righteousness that is by faith,

[1:17]  ¹ tn The nature of the “righteousness” described here and the force of the genitive θεοῦ (“of God”) which follows have been much debated. (1) Some (e.g. C. E. B. Cranfield, Romans [ICC], 1:98) understand “righteousness” to refer to the righteous status given to believers as a result of God’s justifying activity, and see the genitive “of God” as a genitive of source (= “from God”). (2) Others see the “righteousness” as God’s act or declaration that makes righteous (i.e., justifies) those who turn to him in faith, taking the genitive “of God” as a subjective genitive (see E. Käsemann, Romans, 25-30). (3) Still others see the “righteousness of God” mentioned here as the attribute of God himself, understanding the genitive “of God” as a possessive genitive (“God’s righteousness”).

[1:17]  ² tn Grk “in it”; the referent (the gospel) has been specified in the translation for clarity.

[1:17]  ³ tn Or “by faith for faith,” or “by faith to faith.” There are many interpretations of the phrase ἐκ πίστεως εἰς πίστιν (ek pistew" ei" pistin). It may have the idea that this righteousness is obtained by faith (ἐκ πίστεως) because it was designed for faith (εἰς πίστιν). For a summary see J. Murray, Romans (NICNT), 1:363-74.

[1:17]  ⁴ sn A quotation from Hab 2:4.