2 Corinthians 4:7
But we have this treasure [i.e., the Gospel message] in clay pots [i.e., the mortal bodies of the apostles] to show that the [i.e., its] extraordinary power comes from God and not from us.
Romans 3:27
Where then is the [basis for] boasting [i.e., over being right with God]? There is not any. Is it by [obedience to] a law? Is it by doing certain deeds? Not at all, but by a law of faith.
Romans 11:18
Therefore, you should not brag [about your superiority] over the [natural] branches [i.e., the rejected Jews]. But, if you must brag, it should not be over you [Gentiles] nourishing the roots [i.e., the Jews], but over the roots nourishing you.
1 Corinthians 1:27-29
But God chose what the world considers foolish [i.e., people with little apparent ability], in order to shame the "wise people." And He chose what the world considers weak in order to shame what it considers strong.
1 Corinthians 2:4-5
And I did not use persuasive words of [human] wisdom in my message and preaching, but they were [accompanied by] a demonstration of the Holy Spirit and power [from God]. [Note: This "demonstration" could have included the evidence of miraculous spiritual gifts which Paul utilized while there in Corinth. See 14:18].
2 Corinthians 10:4-5
For the weapons of our warfare are not like the world's [i.e., which rely on human ingenuity and unspiritual principles], but they are empowered by God to overthrow [Satanic] fortifications.
Ephesians 2:9
It was not the result of your own [good] deeds [See Titus 3:5], so that no one could boast [about it].
James 4:6
But He gives [us] more unearned favor [i.e., to overcome the world]. Therefore, the Scripture says [Prov. 3:34], "God opposes proud people, but gives unearned favor to those who are humble."