1 Timothy 6:20

O Timothy, keep that which is committed to thy trust; either the doctrine of the gospel, which ministers ought to keep pure, and without mixture, or the ministerial office; be true and faithful in the discharge of it, preaching Christ and the doctrine of Christ. Avoiding profane and vain babblings; avoid all impertinent discoursings under the notion of preaching, which in thy discharge of that work are the best of them but profane babblings. And oppositions of science falsely so called; avoid also all idle speculations, and disputations, no way serving to the end of preaching, and falsely called science.