For Paul, the content of the preaching is Jesus Christ.
Now to him who can strengthen you, according to
my gospel and the proclamation
of Jesus Christ,
according to the revelation of the mystery kept secret
for long ages
1 Corinthians 1:21
For since in the wisdom of God the world did not come
to know God through wisdom, it was the will of God
through the foolishness of
those who have faith.