Possible meanings are 1) Paul is speaking ironically about God's foolishness and weakness. Paul knows God is not foolish or weak. Alternate translation: "what seems to be the foolishness of God is wiser than people's wisdom, and what seems to be the weakness of God is stronger than the people's strength" or 2) Paul is speaking from the point of view of the Greek people who may think God is foolish or weak. Alternate translation: "what people call God's foolishness is really wiser than what people call wisdom, and what people call God's weakness is really stronger than people's strength" (See: [[rc://en/ta/man/jit/figs-irony]])