ESV

A. 26 For consider your calling, brothers:

B. not many of you were wise according to worldly standards,

C. not many were powerful,

D. not many were of noble birth.

B’. 27 But God chose what is foolish in the world to shame the wise;

C’. God chose what is weak in the world to shame the strong;

D’. 28 God chose what is low and despised in the world, even things that are not, to bring to nothing things that are,

2A. 29 so that no human being might boast in the presence of God. 

2B. 30 And because of him you are in Christ Jesus, who became to us wisdom from God, righteousness and sanctification and redemption,

2A’. 31 so that, as it is written, “Let the one who boasts, boast in the Lord.”

Note: the passage is based on a threefold comparison –  (those of noble birth in verse 26 are “the things that are” in verse 28).  At the end of this passage there is an abbreviated  quotation from Jeremiah 9:24, the full version of which is  – “But let him that glorieth glory in this, that he understandeth and knoweth me, that I am the LORD which exercise lovingkindness, judgment, and righteousness, in the earth”. Of great interest is the  previous verse – 9:23 – because it provides the threefold comparators  –the wise, the mighty and the noble – upon which the passage in 1 Cor 1 is structured. 

A Thus saith the LORD,

B. Let not the wise man glory in his wisdom,

C. neither let the mighty man glory in his might,

D. let not the rich man glory in his riches…”

A’. 24 But let him that glorieth glory in this,

B’. that he understandeth and knoweth me,

C’. that I am the LORD which exercise lovingkindness, judgment, and righteousness, in the earth:

D’. for in these things I delight, saith the Lord.

Note: The second part  A’-D’ is a suggestion because wise understand, mighty excercise and rich men delight.