1 Corinthians 1:24–25 (AV)
24 But unto them which are called, both Jews and Greeks, Christ the power of God, and the wisdom of God. 25 Because the foolishness of God is wiser than men; and the weakness of God is stronger than men.
Unto them which are called. Christians, or the body of Christ. For them, Christ is the power of God. Romans 1:16, “For I am not ashamed of the Gospel of Christ: for it is the power of God unto salvation to every one that believeth; to the Jew first, and also to the Greek.” The preaching of Christ crucified (vs. 23) is power.
It is also wisdom of God. Christ on the cross displays the wisdom of God. For it is by One sacrifice that all men are saved. To the Christian, Christ is the power of God and the wisdom of God.
Foolishness of God. The point? God has no foolishness. Weakness. God has no weakness. But even if God did have foolishness and weakness (which, again he does not), it would still be more wise than that of man and stronger than that of man.
So why would any Christian try to get wisdom or strength from the world? We get our wisdom and strength only from the preaching of the Gospel of the cross! For those attending churches where the wisdom of men is taught; e.g., how to manage money, how to lose weight, how to keep your body in physical shape (and there is nothing wrong with any of those in and of themselves) but if the Gospel is not first, then you may consider going somewhere else. Attend a Gospel teaching, Cross teaching, Bible teaching church.
That is power, and that is strength!