1 Corinthians 1:5-7&17, 2:1-5
1:17 "For Christ did not send me to baptize, but to preach the gospel--not with wisdom and eloquence, lest the cross of Christ be emptied of its power"
1: 5-7: "For in him you have been enriched in every way--with all kinds of speech and with knowledge-- God thus confirming our testimony about Christ among you. Therefore you do not lack any spiritual gift as you eagerly wait for our Lord Jesus Christ to be revealed."
2: 1-5 "And so it was with me, brothers and sisters. When I came to you, I did not come with eloquence or human wisdom as I proclaimed to you the testimony about God. For I resolved to know nothing while I was with you except Jesus Christ and him crucified. I came to you in weakness with great fear and trembling. My message and preaching were not with wise and persuasive words, but with a demonstration of the Spirit's power, so that your faith might not rest on human wisdom, but on God's power."