A Bible and Concordance, with a few sermon-notes, or even the impulse of the moment, with the gift of tolerable fluency—these are thought a sufficient warrant to stand up in the name of the great God. But what is solid will alone be permanent. No powers of imagination, natural eloquence, or vehement excitement, can compensate for the want of substantial matter.
-- Bridges, Charles. The Christian Ministry (Kindle Locations 2574-2576). Kindle Edition.
It is not to us, but to His name be the glory of the pulpit.
For since, in the wisdom of God, the world did not know God through wisdom, it pleased God through the folly of what we preach to save those who believe. 22 For Jews demand signs and Greeks seek wisdom, 23 but we preach Christ crucified, a stumbling block to Jews and folly to Gentiles, 24 but to those who are called, both Jews and Greeks, Christ the power of God and the wisdom of God. 25 For the foolishness of God is wiser than men, and the weakness of God is stronger than men.
26 For consider your calling, brothers: not many of you were wise according to worldly standards, not many were powerful, not many were of noble birth. 27 But God chose what is foolish in the world to shame the wise; God chose what is weak in the world to shame the strong; 28 God chose what is low and despised in the world, even things that are not, to bring to nothing things that are, 29 so that no human being might boast in the presence of God. 30 And because of him you are in Christ Jesus, who became to us wisdom from God, righteousness and sanctification and redemption, 31 so that, as it is written, “Let the one who boasts, boast in the Lord.”
-- 1 Corinthians 1:21–31