1 Corinthians 1:27–28 makes the counterintuitive claim central to the New Testament's theology of calling: "God hath chosen the foolish things of the world to confound the wise; and God hath chosen the weak things of the world to confound the mighty; And base things of the world, and things which are despised, hath God chosen." The Greek word for "chosen" — eklekto — is the word for deliberate selection. God's selection process runs opposite to the world's. Choosing the unqualified is not God's fallback — it is his method.
Paul wrote 2 Corinthians 3:5 as someone who had been publicly challenged on his apostolic credentials: "Not that we are sufficient of ourselves to think any thing as of ourselves; but our sufficiency is of God." The Greek word ikanos — "sufficient" — means qualified, capable, adequate. Paul explicitly claims not to be self-sufficient. This is not false humility. It is the theological foundation that makes his work possible: adequacy sourced from God rather than from the self.
Commentary is from a charismatic Protestant perspective, drawing on KJV text and public-domain sources including Spurgeon, Andrew Murray, and Matthew Henry.