The Gospel - it brings justification - meaning God’s mercy - to all people. Here, the Gospel is “of Christ” (see 1:1 - “of God”). It means that Christ - its saving act - is the content of the Gospel.
Paul is not ashamed of preaching the Gospel. Were there any Christians who were ashamed to preach it?
The Gospel is “the power of God unto salvation”.
Soteria- salvation - has two dimensions:
God’s justification is revealed in it! What is it? It is the main attribute of God, namely God’s mercy. On the opposite is God’s wrath (1:18).
God’s justification is:
Rom 10:3 and Phil 3:9, both indicate that there two modes of righteousness: (1) human; (2) divine.
God’s righteousness is “from faith to faithfulness”. In Greek the word “pistin” can be translated as faith or as faithfulness. I translated it here as faithfulness. Its understanding is as follows. Righteousness begins with faith / trust in God’s promise - like in the case of Abraham - and it leads to faithfulness - a full commitment to follow God no matter where He would lead us, no matter what He would expect from us - like Abraham again (see Heb 11:8.17–19).
A translation rendering 1:17 as “from (1) faith to (2) faith” is more common. The usual explanation sees the (1) faith as a ‘beginner’s faith - smaller faith’ that needs to grow to a ‘mature faith’ - the (2) faith. Again Abraham is an example. Jewish tradition based on the Bible lists ten test of Abraham that led him to full maturity in faith:
Paul supports his statement with a quote from Hab 2:4 LXX. However, in his quote he omits the personal pronoun “my” that is present in the book of the prophet: “the just shall live by my faith” (Hab 2:4 LXX - see our discussion on the letter to the Galatians on that matter).
In the text, we have three key words: (1) the just / righteous, (2) faith; (3) life.
There are two possible explanations of the meaning of this important statement:
In the Gospel of Christ is revealed God’s righteousness “from faith to faithfulness”. The entire life of righteous person is marked by faith. Yet, there is also something else that is revealed, namely God’s wrath. This God’s wrath is revealed from heaven, not in the Gospel (1:18).
Thus, we have two things being revealed: