Ecclesiastes 12:9-12

And moreover, because the preacher was wise, he still taught the people knowledge; yea, he gave good heed, and sought out, and set in order many proverbs. (10) The preacher sought to find out acceptable words: and that which was written was upright, even words of truth. (11) The words of the wise are as goads, and as nails fastened by the masters of assemblies, which are given from one shepherd. (12) And further, by these, my son, be admonished: of making many books there is no end; and much study is a weariness of the flesh.

It is a part which requires much grace from God, to have a choice of pure words in preaching, as well as pure doctrine. Sound speech, (one calls it) that cannot be condemned. Titus 2:8. But the plainest language is most scriptural. And the word of God, in its own pure, simple, unadulterated form, is most likely to take effect. The polished handle of a sword will give no additional keenness to its edge. And the word of God, when naked, will be most cutting, and quick, and powerful. Hebrews 4:12. But after all, it is the master of assemblies, who can alone fasten his own word as goads upon the minds of the people. And who, but Jesus, is that Master, that one Shepherd, which can do this? Ezekiel 34:23; Zechariah 14:9. Blessed Master! do thou cause thy word to have an abiding influence in my heart; and there let it be fastened by thine own almighty arm as a nail in a sure place. Isaiah 22:23; Ezra 9:8.