1 Corinthians 1:18, 21, 23

For the message of the cross is foolishness [absurd and illogical] to those who are perishing and spiritually dead [because they reject it], but to us who are being saved [by God’s grace] it is [the manifestation of] the power of God.

For since the world through all its [earthly] wisdom failed to recognize God, God in His wisdom was well-pleased through the foolishness of the message preached [regarding salvation] to save those who believe [in Christ and welcome Him as Savior].

but we preach Christ crucified, [a message which is] to Jews a stumbling block [that provokes their opposition], and to Gentiles foolishness [just utter nonsense]