The words of the wise are like goads, and the words of scholars are like well-driven nails, given by one Shepherd.
Ecclesiastes 12:11
Surrounding context
12:10 The Preacher sought to find acceptable words; and what was written was upright-- words of truth.
12:11 The words of the wise are like goads, and the words of scholars are like well-driven nails, given by one Shepherd.
12:12 And further, my son, be admonished by these. Of making many books there is no end, and much study is wearisome to the flesh.