1 Corinthians 2:2-5

for I made the decision to know nothing [that is, to forego philosophical or theological discussions regarding inconsequential things and opinions while] among you except Jesus Christ, and Him crucified [and the meaning of His redemptive, substitutionary death and His resurrection]. I came to you in [a state of] weakness and fear and great trembling. And my message and my preaching were not in persuasive words of wisdom [using clever rhetoric], but [they were delivered] in demonstration of the [Holy] Spirit [operating through me] and of [His] power [stirring the minds of the listeners and persuading them], so that your faith would not rest on the wisdom and rhetoric of men, but on the power of God.