The Nature of the gospel of Jesus Christ. It is foolishness to the perishing v.18 It cannot be destroyed v.19-20 It cannot be discovered (by mere human intellect) v.21-23 It has a power all its own v.18, 24-25.
“The cross does not part the sea for the people to cross in safety and then drown the pursuing enemy. Instead, it splits the temple veil, and only those who see with faith can see the defeat of the enemy. Paul is not attacking Jews as such but a problem endemic to all those who expect God to provide to their satisfaction visible confirmation before they will risk faith.”
(Baker Exegetical Comm. Garland pg. 69)
“…had no formal education, no training in a trade or profession, no money, no military rank, no political position, no social pedigree, no prestige, no impressive appearance or oratory. Yet Jesus said, “Truly, I say to you, among those born of women there has not arisen anyone greater than John the Baptist” (Mt. 11:11) This man fit none of the world’s standards but all of God’s.
(MacArthur Comm. pg. 51)