1 Corinthians 1:20-21

20 Where is the wise man?
Where is the scholar?
Where is the philosopher of this age?
Has not God made foolish the wisdom of the world?

21 For since in the wisdom of God the world through its wisdom did not know him,
God was pleased through the foolishness of what was preached (touv khru/gmatoß of preaching)
to save (sw◊sai) those who believe (pisteu/ontaß).

EXEGETICAL IDEA (what it meant):
Subject: What explanation does Paul give the Corinthians concerning why God was pleased through foolishness to save those who believe?

Complement: Paul explains to the Corinthians that God was pleased through the foolishness of preaching to save those who believed because God has made foolish the wisdom of the world (to include the wise, the scholar and the philosopher of this age).