1 Corinthians 1:21–22 (AV)
21 For after that in the wisdom of God the world by wisdom knew not God, it pleased God by the foolishness of preaching to save them that believe. 22 For the Jews require a sign, and the Greeks seek after wisdom:
How is a person saved? Not by signs or wisdom, but by the foolishness of preaching. Here the word preaching is the Greek word, kerygma which is that which is proclaimed by a public crier. In this case the proclamation is the cross of Christ (1:17).
The Gospel must be proclaimed! Man is saved by the clear revelation of God through the Gospel.
The Jews require a sign…Greeks seek after wisdom. People seek after signs today. Many churches work hard to appeal to emotionalism; even lighting in a church to help set the mood so people can be more easily manipulated. These are signs people seek today. Some large churches do more to produce a Broadway show than they do preaching the Gospel; The Gospel is too simplistic–people won’t come back if that’s all we teach! We must give them signs!
Churches today also try to provide wisdom: Financial seminars, how to lose weight classes, aerobics, on and on, trying to give their people wisdom. Often it is just the same wisdom of the world that can be found by Googling the subject. Everything is being taught but the Gospel.
Neither signs or wisdom will save.