These verse offer a nice parallel to the preceding passage (1 Cor 1:18-31) which emphasizes that God is not known or discovered through any devices/smarts/wisdom of our own. He chooses to whom He will disclose Himself in power. Once discovered, how does a spiritual person then proclaim what he knows in order to witness to the truth? Well, according to these verses it is again a divine negation…the proclamation is NOT through “superiority of speech or of wisdom”. Again God’s power through the Spirit uses us in our weakness to reveal Himself through us. What then does it mean to be weak in this context? This does not imply incompetence masquerading as contrite humility. But as we present ourselves for ministry (fully prepared and practiced), Paul reminds us here that our efforts are inadequate on so many levels but where the heart is right, God’s power shows through those efforts “so that your faith would not rest on the wisdom of men but on the power of God” (verse 5).