From Mark Booker
Psalms 6-8: Psalm 6 is the first of the seven penitential psalms (the others are 32, 38, 51, 102, 130, and 143) though it is the least explicit in terms of confessing sin (a slight hint in vv.1-2). The psalmist languishes in a challenging condition but expresses the heart of humble dependence (v4), appealing to God's steadfast love as the means of deliverance. Psalm 7 is a petition for rescue from enemies. The psalmist wants truth to prevail, and he notes, in v14, the progression in the wicked from evil to mischief to lies. He also recalls God's righteous judgment (v8), a hopeful reality to victims of injustice everywhere. Psalm 8 refers to humanity's place of dominion in the world, over all creatures but - and this is important! - under the sovereignty of God (v1, v9). We are God's image bearers who exercise dominion in God's world under God's rule. This psalm points back to Genesis 1.26-28 and forward to Jesus who fulfills humanity's vocation (see esp. Hebrews 2).
Romans 1.1-7: The 'gospel (good news) of God' is all about Jesus, God's son, and his resurrection from dead. And Paul writes that this was "promised beforehand through his prophets in the holy Scriptures" (v2). That's the Old Testament. As we read the Old Testament we should be looking for that promise. Note that the gospel produces the 'obedience of faith' among the nations. That phrase is repeated at the end of Romans in 16.27.